TWI689647B - Polyolefin synthetic fiber treatment agent and polyolefin synthetic fiber - Google Patents

Abstract

The polyolefin-based synthetic fiber treatment agent of the present invention is characterized by containing the following polyoxyalkylene derivative and the following linear hydrocarbon. The polyoxyalkylene derivative is a compound containing at least one compound selected from ethylene oxide and propylene oxide at a ratio of 5 to 100 moles relative to 1 mole of aliphatic monohydric alcohol having a carbon number of 24 to 60 . The linear hydrocarbon is a linear hydrocarbon having 10 to 100 carbon atoms. The polyolefin-based synthetic fiber of the present invention is characterized in that the above-mentioned polyolefin-based synthetic fiber treatment agent is attached.

Description

Polyolefin-based synthetic fiber treatment agent and polyolefin-based synthetic fiber

The present invention relates to a polyolefin-based synthetic fiber treatment agent, which imparts excellent carding machine passability to polyolefin-based synthetic fibers, and imparts excellent initial hydrophilicity and durable hydrophilicity to carded webs composed of polyolefin-based synthetic fibers. And anti-wetting properties; and polyolefin-based synthetic fibers to which the treatment agent is attached.

In general, for hygienic products such as paper diapers, products in which polyolefin-based synthetic fibers are coated on the surface of a superabsorbent polymer to absorb body fluids are known. The synthetic fibers covering the surface of the superabsorbent polymer are particularly required to: rapidly absorb the initial hydrophilicity of body fluids, the durable hydrophilicity that repeatedly absorbs body fluids repeatedly, and prevent moisture from leaking out of the water held in the superabsorbent polymer Sex. Therefore, the surface of the polyolefin-based synthetic fiber may be treated with a polyolefin-based synthetic fiber treatment agent containing a surfactant or the like. However, when polyolefin-based synthetic fibers are manufactured in a dry method using non-woven fabrics and the like using a carding roller (carding machine), carding machine passingability becomes indispensable.

A polyolefin-based synthetic fiber treatment agent disclosed in Patent Document 1 is currently known. Patent Document 1 discloses a polyolefin-based synthetic fiber treatment agent including a surfactant in which a predetermined polyoxyalkylene-modified polysiloxane and a hydrocarbon group having a carbon number of 28 or more are used as a hydrophobic group.

Prior technical literature Patent Literature Patent Document 1: Japanese Patent Laid-Open No. 2-80672

Problems to be solved by the invention However, these conventional polyolefin-based synthetic fiber treatment agents still fail to fully combine the excellent cardability of polyolefin-based synthetic fibers, the initial hydrophilicity of the card web, the durable hydrophilicity, and the anti-wetting Sexual and other functions.

The problem to be solved by the present invention is to provide a polyolefin-based synthetic fiber treatment agent and a polyolefin-based synthetic fiber, which can give the polyolefin-based synthetic fiber excellent carding machine passability and impart carding Cotton net has excellent initial hydrophilicity, durable hydrophilicity, and anti-wetting.

Means to solve the problem The present inventors conducted studies to solve the above-mentioned problems, and found that a polyolefin-based synthetic fiber treatment agent containing a specific polyoxyalkylene derivative and a specific linear hydrocarbon compound is particularly effective.

In order to achieve the above object, one aspect of the present invention provides a polyolefin-based synthetic fiber treatment agent characterized by containing the following polyoxyalkylene derivative and the following linear hydrocarbon compound.

The polyoxyalkylene derivative is a compound containing at least one compound selected from ethylene oxide and propylene oxide at a ratio of 5 to 100 moles relative to 1 mole of aliphatic monohydric alcohol having a carbon number of 24 to 60 . The linear hydrocarbon is a linear hydrocarbon having 10 to 100 carbon atoms.

Preferably, the linear hydrocarbon is polyethylene.

Preferably, the linear hydrocarbon compound has 20 to 60 carbon atoms.

Preferably, the polyolefin-based synthetic fiber treatment agent contains the polyoxyalkylene derivative when the total content of the polyoxyalkylene derivative and the linear hydrocarbon is 100% by mass. It is composed of 50 to 99% by mass and 1 to 50% by mass of the linear hydrocarbon.

Preferably, the polyolefin-based synthetic fiber treatment agent further contains an anionic surfactant.

Preferably, the anionic surfactant is at least one selected from phosphate salt type anionic surfactants, sulfonate type anionic surfactants, sulfate ester type anionic surfactants, and fatty acid salt type anionic surfactants. .

Preferably, the polyolefin-based synthetic fiber treatment agent contains when the total content ratio of the polyoxyalkylene derivative, the linear hydrocarbon, and the anionic surfactant is 100% by mass. The polyoxyalkylene derivative is 20.0 to 80.0% by mass, the linear hydrocarbon is 0.1 to 20.0% by mass, and the anionic surfactant is 5.0 to 50.0% by mass.

Preferably, the polyolefin-based synthetic fiber treatment agent is given to the polyolefin-based synthetic fiber for nonwoven fabric.

In addition, another aspect of the present invention provides a polyolefin-based synthetic fiber, characterized in that the above-mentioned polyolefin-based synthetic fiber treatment agent is attached.

Invention effect According to the present invention, polyolefin-based synthetic fibers can be provided with excellent carding machine passability, and carded webs can be provided with excellent initial hydrophilicity, durable hydrophilicity, and moisture regain resistance.

(First embodiment) Hereinafter, the first embodiment of the polyolefin-based synthetic fiber treatment agent (hereinafter referred to as treatment agent) embodied in the present invention will be described. The treatment agent of the present embodiment contains the following polyoxyalkylene derivative and the following linear hydrocarbon compound.

The polyoxyalkylene derivative is a compound containing at least one compound selected from ethylene oxide and propylene oxide at a ratio of 5 to 100 moles relative to 1 mole of aliphatic monohydric alcohol having a carbon number of 24 to 60 .

The linear hydrocarbon is a linear hydrocarbon having 10 to 100 carbon atoms.

The polyoxyalkylene derivative used in the treatment agent of this embodiment is 1 mole of aliphatic monohydric alcohol having 24 to 60 carbon atoms, and is selected from ethylene oxide at a ratio of 5 to 100 moles. And at least one compound of propylene oxide. The aliphatic monohydric alcohol having 24 to 60 carbon atoms is not particularly limited, and examples thereof include tetracosyl alcohol, hexacosyl alcohol, octacosanyl alcohol, tricosyl alcohol, and tricosyl alcohol. Alcohol, tetradecyl alcohol, pentadecyl alcohol, hexadecyl alcohol, 2-methyl-1-octacosyl alcohol, 8-methyl-1-tetracosyl alcohol, 20-methyl Base-pentadecyl alcohol and so on. By limiting the carbon number of the aliphatic monohydric alcohol to 24 or more, the effect of the present invention can be improved, especially the carding machine passing property and durable hydrophilicity. On the other hand, by limiting the carbon number of the aliphatic monohydric alcohol to 60 or less, the effect of the present invention can be improved, especially the durable hydrophilicity.

In addition, by limiting the number of addition moles of at least one selected from ethylene oxide and propylene oxide to 5 moles or more, the effect of the present invention can be improved, particularly the initial hydrophilicity. On the other hand, by limiting the number of addition moles of at least one selected from ethylene oxide and propylene oxide to 100 moles or less, the effect of the present invention can be improved, especially the durable hydrophilicity.

The polyoxyalkylene derivative is not particularly limited, and examples thereof include polyoxyethylene (10 moles: the addition mole number of ethylene oxide or propylene oxide. The same applies hereinafter). Ethylene (80 mol) trialkyl ether, polyoxyethylene (80 mol) pentaalkyl ether, polyoxyethylene (40 mol) polyoxypropylene (40 mol) pentaalkyl ether, polyoxy Ethylene (40 mol) tetradecyl ether, etc. Among them, the addition form of ethylene oxide or propylene oxide is not particularly limited, and may be either block addition or random addition. One type of polyoxyalkylene derivative may be used alone, or two or more types may be used in combination.

The linear hydrocarbon used in the treatment agent of the present embodiment has a carbon number of 10 to 100, preferably a carbon number of 20 to 60. By limiting the carbon number to 10 or more, the effect of the present invention can be improved, especially the card passability. On the other hand, by limiting the carbon number to 100 or less, the effect of the present invention can be improved, particularly the anti-wetting property.

The linear hydrocarbon is not particularly limited, and examples thereof include polypropylene and polyethylene. Among these, polyethylene is preferred. Linear hydrocarbons may be used alone or in combination of two or more.

In the treatment agent of the present embodiment, the content ratio of the polyoxyalkylene derivative and the linear hydrocarbon in the treatment agent is not limited. Preferably, when the total content ratio of the polyoxyalkylene derivative and linear hydrocarbon is 100% by mass, the treatment agent contains 50-99% by mass of the polyoxyalkylene derivative and linear The hydrocarbon is produced at a ratio of 1.0 to 50.0% by mass. By being limited to this range, the effect of the present invention can be further enhanced.

The treatment agent of this embodiment is preferably formed by further containing an anionic surfactant. By blending an anionic surfactant, the effect of the present invention can be further improved, especially the initial hydrophilicity. The type of anionic surfactant is not limited, and examples thereof include octyl phosphate ester salt, isooctyl phosphate ester salt, undecyl phosphate ester salt, dodecyl phosphate ester salt, tridecyl phosphate ester salt, Myristyl phosphate salt, isooctyl phosphate salt, 2-ethylhexyl phosphate salt, isotridecanyl phosphate salt, isocetyl phosphate salt, polyoxyethylene octyl ether phosphate salt , Polyoxyethylene isooctyl ether phosphate salt, polyoxyethylene-2-ethylhexyl ether phosphate salt, polyoxyethylene undecyl ether phosphate salt, polyoxyethylene dodecyl ether phosphate salt, poly Phosphate salt type anionic surfactants such as oxyethylene tridecyl ether phosphate salt, polyoxyethylene tetradecyl ether phosphate salt, polyoxyethylene cetyl ether phosphate salt; octyl sulfonate, Sulfonic acid such as undecyl sulfonate, dodecyl sulfonate, tetradecyl sulfonate, cetyl sulfonate, octyl benzene sulfonate, dodecyl benzene sulfonate, etc. Salt-type anionic surfactants; sulfate-type anionic surfactants such as octyl sulfate, undecyl sulfate, dodecyl sulfate, tetradecyl sulfate, and cetyl sulfate; octanoate, capric acid Fatty acid salt type anionic surfactants such as salt, laurate, oleate, etc. Among these, anionic surfactants composed of alkali metal salts such as sodium salts and potassium salts are preferred. One type of anionic surfactant may be used alone, or two or more types may be used in combination.

In the treatment agent of this embodiment, the content ratio of the above-mentioned polyoxyalkylene derivative, linear hydrocarbon, and anionic surfactant in the treatment agent is not limited. Preferably, when the total content ratio of the polyoxyalkylene derivative, linear hydrocarbon, and anionic surfactant is 100% by mass, the treatment agent contains the polyoxyalkylene derivative 20.0 to 80.0 It is formed by the ratio of mass%, linear hydrocarbon 0.1 to 20.0 mass%, and anionic surfactant 5.0 to 50.0 mass%. By being limited to this range, the effect of the present invention can be further enhanced.

The treatment agent of this embodiment is attached to polyolefin-based synthetic fibers. In particular, when attached to polyolefin-based synthetic fibers used for nonwoven fabrics, the resulting nonwoven fabrics have better performance in terms of durability, hydrophilicity, moisture regain resistance, and initial hydrophilicity.

(Second embodiment) Next, a second embodiment of the polyolefin-based synthetic fiber (hereinafter referred to as a synthetic fiber) embodied in the present invention will be described. The synthetic fiber of this embodiment is a polyolefin-based synthetic fiber to which the treatment agent of the first embodiment is attached. Polyolefin-based synthetic fibers are not particularly limited, and examples thereof include polyolefin-based fibers such as polyethylene fibers, polypropylene fibers, and polybutene fibers. One of these may be used alone, or two or more may be used in combination. In addition, it is a composite fiber with a core-sheath structure, and either or both of the core and the sheath are polyolefin fibers, for example, polyethylene/polypropylene composite fibers and polyethylene/polyester with polyethylene fibers as the sheath. Composite fibers, etc.

The ratio of the treatment agent (without solvent) of the first embodiment adhering to the synthetic fiber is not particularly limited, and it is preferable that the treatment agent of the first embodiment is 0.05 to 5.0% by mass relative to the synthetic fiber. Way to attach. By being limited to this range, the effect of the present invention can be further enhanced. The treatment agent of the first embodiment is not particularly limited in which step it is attached. For example, it can be used in any one of the spinning step, the stretching step, and the crimping step. From the viewpoint of exhibiting the effect of the present invention well, it is preferable to perform the attachment before or after the spinning step or the crimping step. As the adhesion method, a well-known method can be suitably used, and examples thereof include a dipping oil supply method, a spray oil supply method, a drum oil supply method, and a guided oil supply method using a metering pump. Among these, from the viewpoint of well exhibiting the effects of the present invention, the dipping oiling method, spray oiling method, or drum oiling method is preferred. The form of the treatment agent when the treatment agent of the first embodiment is attached to the synthetic fiber may be, for example, an organic solvent solution or an aqueous solution.

According to the polyolefin-based synthetic fiber treatment agent and polyolefin-based synthetic fiber of the above embodiment, the following effects can be obtained.

(1) In the above embodiment, the polyoxyalkylene derivative in the polyolefin-based synthetic fiber treatment agent is used at a ratio of 5 to 100 moles relative to 1 mole of aliphatic monohydric alcohol having a carbon number of 24 to 60. At least one compound selected from ethylene oxide and propylene oxide is added. In addition, the linear hydrocarbon is a linear hydrocarbon having 10 to 100 carbon atoms. Therefore, it is possible to give polyolefin-based synthetic fibers excellent cardability. In addition, it is possible to impart excellent initial hydrophilicity, durable hydrophilicity, and anti-wetting properties to the card web produced by the carding roller (carding machine).

However, the above embodiment can also be modified as follows.

・Within the range that does not impair the effects of the present invention, the treatment agent of the above-described embodiment can be further blended with components that can be commonly used as treatment agents such as adhesives, antioxidants, ultraviolet absorbers, etc., to maintain the stability of the quality of the treatment agent Chemical or antistatic agent.

Examples

In order to more specifically explain the structure and effects of the present invention, examples and the like are given below, but the present invention is not limited to these examples. In the following description of Examples and Comparative Examples, parts represent parts by mass and% represents mass%.

Test Category 1 (Preparation of Polyolefin Synthetic Fiber Treatment Agent)

・Preparation of polyolefin synthetic fiber treatment agent (Example 1) 35.0 g of polyoxyethylene (10 mol) trialkyl ether (A-1), 5.0 g of polyethylene with a carbon number of 30 (B-1), and 10.0 g of potassium octyl phosphate (C-1) were mixed Then, 950.0 g of water was added and stirred to form an aqueous dispersion liquid, thereby obtaining a 5.0% aqueous liquid of the treatment agent for polyolefin-based synthetic fibers of Example 1.

・Preparation of polyolefin-based synthetic fiber treatment agents (Examples 2 to 14 and Comparative Examples 1 to 13) In the same order as the preparation of the polyolefin-based synthetic fiber treatment agent of Example 1, the types of polyoxyalkylene derivatives, polyethylene, anionic surfactants, and other components used in the treatment, and the components of the treatment agent The content ratio (%) was changed as shown in the column of "Polyolefin-based synthetic fiber treatment agent" in Table 2, and the treatment agents of Examples 2 to 14 and Comparative Examples 1 to 13 were prepared. Table 1 shows the details of each polyoxyalkylene derivative used in the preparation of these treatment agents, that is, the carbon number of aliphatic alcohols, ethylene oxide (hereinafter referred to as EO) or propylene oxide (hereinafter referred to as PO) The added mole number.

Table 1

Table 2

The codes in Table 1 and Table 2 indicate: A-1: Polyoxyethylene (10 mol) trialkyl ether A-2: Polyoxyethylene (80 mol) trialkyl ether A-3: Polyoxyethylene (80 mol) pentadecyl ether A-4: Polyoxyethylene (40 mol) polyoxypropylene (40 mol) pentadecyl ether A-5: Polyoxyethylene (40 moles) tetradecyl ether ra-1: polyoxyethylene (10 mol) behenyl ether ra-2: Polyoxyethylene (10 mol) hexadecyl ether ra-3: polyoxyethylene (3 mol) trialkyl ether ra-4: polyoxyethylene (120 mol) trialkyl ether ra-5: polyoxyethylene (60 mol) polyoxypropylene (60 mol) trialkyl ether ra-6: polyoxyethylene (10 mol) octyl ether B-1: Polyethylene with a carbon number of 30 B-2: Polyethylene with carbon number 50 rb-1: C6 polyethylene rb-2: Polyethylene with carbon number 150 C-1: potassium octyl phosphate C-2: sodium dodecylbenzenesulfonate C-3: sodium dodecyl sulfate C-4: potassium caprylate D-1: Polyoxyalkylene modified polysiloxane (POEO content 50%, PO/EO=50/50, molecular weight 5,000)

Test category 2 (Adhesion and evaluation of polyolefin-based synthetic fiber treatment agent)

The polyolefin-based synthetic fiber is a polyolefin-based composite fiber prepared with polyethylene in the sheath portion, polyester in the core portion, a fineness of 2.2 dtex, and a fiber length of 51 mm. The aqueous solution of the treatment agent for polyolefin-based synthetic fibers prepared in Test Category 1 was adhered to the polyolefin-based composite fibers so that the adhesion amount (without solvent) became 0.35% by mass using the spray oil method. Then, it was dried in a hot air dryer at 80°C for 1 hour to obtain a treated polyolefin synthetic fiber treated cotton.

・Evaluation of the passability of the card as the original cotton evaluation item 20 g of the treated polyolefin-based synthetic fiber treated cotton was humidified in a constant temperature room at 20° C. and 65% RH for 24 hours, and then used for a carding roller (carding machine). The ratio of the discharge amount to the input amount was calculated, and the evaluation was performed according to the following evaluation criteria. The results are shown in Table 2 in the "Card Passability" column.

・Evaluation criteria for card passability ◎ (Excellent): The discharge volume is over 85% ○ (good): Discharge volume is more than 60% and less than 85% × (Not possible): Discharge volume is less than 60%

Test category 3 (Preparation and evaluation of polyolefin-based synthetic fiber nonwoven fabric)

・Evaluation of Durable Hydrophilicity 100g of treated polyolefin synthetic fiber treated cotton obtained in Test Category 2 was humidified in a constant temperature room at 20°C and 65% RH for 24 hours, and then used a carding roller (carding machine) A carding net with a basis weight of 20 g/m ^{2 was} produced. The obtained card web was subjected to hot air treatment at 140° C. for 10 seconds to serve as a sample for evaluation of durable hydrophilicity. The sample was cut into small pieces of 10 cm×10 cm, and humidified in a constant temperature room at 20° C. and 60% RH for 24 hours. Place the humidity-adjusted nonwoven on top of the five overlapping filter papers, and then set up a cylinder with an inner diameter of 1 cm and two ends open vertically at the center of the upper part, and inject 10 ml of 0.9% physiological saline into the cylinder. The time until the saline solution was completely absorbed into the non-woven fabric was measured. Then, the nonwoven fabric was taken out and air-dried at 40°C for 90 minutes. The same operation was repeated three times in total, and the third time was evaluated according to the following evaluation criteria. The results are shown in the "Durable Hydrophilicity" column of Table 2.

・Evaluation criteria for durable hydrophilicity ◎ (Excellent): The time required until physiological saline is completely absorbed is less than 5 seconds ○ (Good): The time required for the physiological saline solution to be completely absorbed is 5 seconds or more and less than 8 seconds × (Not possible): The time required for the physiological saline solution to be completely absorbed is 8 seconds or more

・Evaluation of moisture resistance The above-mentioned durable hydrophilic evaluation sample was cut into small pieces of 10 cm×10 cm, and humidified in a constant temperature room at 20° C. and 65% RH for 24 hours. A 10 cm×10 cm nonwoven sheet was cut out from the outermost nonwoven material of a commercially available paper diaper, and the above-mentioned humidity-adjusted 10 cm×10 cm small piece was attached to this cut-out portion as a sample for evaluation of anti-humidity. Place the anti-wetting evaluation sample horizontally with the small piece installed facing upwards, and then set up a cylinder with an inner diameter of 6 cm and two ends open vertically at the center of the small piece, and inject 80 ml of water into the cylinder and let it stand 5 minutes to allow water to be sucked into the interior of the diaper. Then superimpose 15 pieces of 10cm×10cm filter paper on the installed small piece, and then place a 10cm×10cm, 5.0kg hammer plate on it. After 2 minutes of loading, measure the total mass of the 15 pieces of overlapping filter paper and calculate the increase in the mass Rate, and evaluated according to the following evaluation criteria. The results are shown in the "Remove resistance" column of Table 2.

・Evaluation criteria for anti-wetting ◎ (Excellent): The rate of quality increase is less than 1% ○ (Good): The rate of mass increase is more than 1% and less than 2% × (Not possible): The rate of mass increase is 2% or more

・Evaluation of initial hydrophilicity The sample for the above-mentioned durable hydrophilicity evaluation was conditioned in a constant temperature room at 20°C and 65% RH for 24 hours, and then placed on a horizontal plate. Using a burette, 0.5 ml of water droplets were dropped from a height of 10 mm to determine that the water droplets were completely absorbed. The time required for the sample (time required for water penetration) was evaluated according to the following evaluation criteria. The results are shown in the "Initial Hydrophilicity" column of Table 2.

・Evaluation criteria for initial hydrophilicity ◎ (Excellent): The time required to penetrate the water is less than 0.5 seconds ○ (Good): The time required for water penetration is 0.5 seconds or more and less than 2.0 seconds × (impossible): The time required to penetrate the water is 2.0 seconds or more

As shown in Table 2, Comparative Examples 1, 2, 12, and 13 that did not contain linear hydrocarbons were confirmed to be particularly poor in the evaluation of anti-wetting properties with respect to the Examples. In addition, Comparative Example 3 containing no polyoxyalkylene derivative was confirmed to be particularly poor in evaluation of carding machine passability, durable hydrophilicity, and anti-wetting property with respect to each example. In addition, Comparative Examples 4 and 9 in which the aliphatic alcohols constituting the polyoxyalkylene derivative have a carbon number of less than 24 were confirmed to be poor in evaluation of carding machine passability and durable hydrophilicity relative to each example. . In addition, Comparative Example 5 in which the aliphatic alcohols constituting the polyoxyalkylene derivative have a carbon number of 65 was confirmed with respect to each of the examples, especially in evaluation of durable hydrophilicity, moisture regain resistance, and initial hydrophilicity. good. In addition, the comparative example 6 in which the addition mole number of the alkylene oxides constituting the polyoxyalkylene derivative is 3 has been confirmed to be particularly excellent in durable hydrophilicity, moisture regain resistance, and initial hydrophilicity with respect to each example. Poor evaluation. In addition, Comparative Examples 7 and 8 in which the addition mole number of the alkylene oxides constituting the polyoxyalkylene derivative was 120 in total were confirmed to be inferior in the evaluation of durable hydrophilicity relative to each of the Examples. Comparative Example 10 in which the carbon number of polyethylene is 6 has been confirmed to be particularly poor in evaluation of the carding machine passability for each example. Comparative Example 11 in which the carbon number of polyethylene is 150 has been confirmed to be particularly poor in evaluation of durable hydrophilicity, moisture regain resistance, and initial hydrophilicity relative to each example.

From the results of Table 2 above, it can be seen that according to the present invention, polyolefin-based synthetic fibers can be provided with excellent carding machine passability, and at the same time, carding webs composed of polyolefin-based synthetic fibers can be provided with excellent initial hydrophilicity and durable hydrophilicity. And anti-wetting effect.

Claims (9)

A polyolefin-based synthetic fiber treatment agent, characterized by containing the following polyoxyalkylene derivatives and the following linear hydrocarbons; polyoxyalkylene derivatives: relative to the carbon number of 24 to 60 1 mole of aliphatic monohydric alcohol, added with a compound selected from at least one of ethylene oxide and propylene oxide at a ratio of 5 to 100 moles; linear hydrocarbon: a straight chain of 10 to 100 carbon atoms Chain hydrocarbons. The polyolefin-based synthetic fiber treatment agent according to claim 1, wherein the linear hydrocarbon is polyethylene. The polyolefin-based synthetic fiber treatment agent according to claim 1 or 2, wherein the linear hydrocarbon compound has 20 to 60 carbon atoms. The polyolefin-based synthetic fiber treatment agent according to claim 1 or 2, wherein when the total content ratio of the polyoxyalkylene derivative and the linear hydrocarbon is 100% by mass, the The polyoxyalkylene derivative is 50 to 99% by mass and the linear hydrocarbon is 1 to 50% by mass. The polyolefin-based synthetic fiber treatment agent according to claim 1 or 2, which further contains an anionic surfactant. The polyolefin-based synthetic fiber treatment agent according to claim 5, wherein the anionic surfactant is selected from a phosphate salt type anionic surfactant, a sulfonate type anionic surfactant, and a sulfate ester type anionic interface activity At least one of an agent and a fatty acid salt type anionic surfactant. The polyolefin-based synthetic fiber treatment agent according to claim 5, wherein when the polyoxyalkylene derivative, the linear hydrocarbon, and the anion interface are active When the total content of the active agent is set to 100% by mass, the polyoxyalkylene derivative 20.0 to 80.0% by mass, the linear hydrocarbon 0.1 to 20.0% by mass, and the anionic surfactant 5.0 to 50.0% by mass. The polyolefin-based synthetic fiber treatment agent according to claim 1 or 2, wherein the polyolefin-based synthetic fiber treatment agent is given to a polyolefin-based synthetic fiber for nonwoven fabrics. A polyolefin-based synthetic fiber, characterized in that the polyolefin-based synthetic fiber treatment agent according to any one of claims 1 to 8 is attached.