JP2019206682A - Additive for polyolefin resin, polyolefin resin composition, polyolefin-based synthetic fiber nonwoven fabric, production method of polyolefin-based synthetic fiber nonwoven fabric - Google Patents

Abstract

To provide an additive for a polyolefin resin capable of showing hydrophilicity, especially, just after production of the polyolefin resin; and to provide a polyolefin resin composition, a polyolefin-based synthetic fiber nonwoven fabric, and a production method of the polyolefin-based synthetic fiber nonwoven fabric.SOLUTION: An additive for a polyolefin resin contains following aliphatic alcohol, and following oxyethylene alkyl ether. The aliphatic alcohol is monohydric aliphatic alcohol having a carbon number of 16-32. The oxyethylene alkyl ether is a compound formed by adding ethylene oxide at the ratio below 2 moles on the average to 1 mol monohydric aliphatic alcohol having a carbon number of 12-26.SELECTED DRAWING: None

Description

  The present invention relates to a polyolefin resin additive, a polyolefin resin composition, a polyolefin synthetic fiber nonwoven fabric, and a method for producing a polyolefin synthetic fiber nonwoven fabric, which develop hydrophilicity immediately after the production of the polyolefin resin.

  In general, as a sanitary product such as a disposable diaper, a product in which the surface of a superabsorbent polymer is coated with a synthetic polyolefin fiber to absorb body fluid is known. Synthetic fibers covering the surface of the superabsorbent polymer are required to have excellent absorption characteristics such as hydrophilicity, spot absorbability, and durable hydrophilicity that quickly absorbs body fluids. In the polyolefin resin, from the viewpoint of imparting the above characteristics, an additive for a polyolefin resin used by mixing with the polyolefin resin is known. For example, Patent Document 1 discloses an ether compound in which 2 to 10 moles of alkylene oxide such as ethylene oxide is added to a hydrocarbon group having 22 to 40 carbon atoms as an additive for polyolefin resin used in a mixture with polyolefin.

JP-T-2004-523666

However, this conventional additive for polyolefin-based resins has a problem that hydrophilicity is not expressed immediately after the production of the polyolefin-based resin.
The problems to be solved by the present invention are, in particular, an additive for polyolefin resin, a polyolefin resin composition, a polyolefin synthetic fiber nonwoven fabric, and a polyolefin synthetic fiber capable of developing hydrophilicity immediately after the production of the polyolefin resin. It exists in the place which provides the manufacturing method of a nonwoven fabric.

  As a result of researches to solve the above-mentioned problems, the present inventors have found that a polyolefin resin additive containing a specific aliphatic alcohol and a specific oxyethylene alkyl ether is correctly suitable.

  In order to achieve the above object, in one embodiment of the present invention, there is provided an additive for polyolefin resin, which contains the following aliphatic alcohol and the following oxyethylene alkyl ether. The aliphatic alcohol is a monovalent aliphatic alcohol having 16 to 32 carbon atoms. The oxyethylene alkyl ether is a compound in which ethylene oxide is added in an average ratio of less than 2 mol to 1 mol of a monovalent aliphatic alcohol having 12 to 26 carbon atoms.

The aliphatic alcohol is preferably a monovalent aliphatic alcohol having 18 to 26 carbon atoms.
It is preferable that the oxyethylene alkyl ether is a compound in which ethylene oxide is added in an average ratio of less than 2 moles with respect to 1 mole of a monovalent aliphatic alcohol having 16 to 24 carbon atoms.

  The oxyethylene alkyl ether is preferably a compound in which ethylene oxide is added at an average ratio of less than 1.5 moles per mole of the monohydric aliphatic alcohol.

  When the total content of the aliphatic alcohol and the oxyethylene alkyl ether is 100% by mass, the aliphatic alcohol is contained at 1 to 70% by mass, and the oxyethylene alkyl ether is contained at a rate of 30 to 99% by mass. It is preferable to do.

  Furthermore, it is preferable to contain the following fatty acid derivative. The fatty acid derivative includes an ester compound of a monocarboxylic acid having 16 to 24 carbon atoms and a monovalent aliphatic alcohol, an ester compound of a monocarboxylic acid having 16 to 24 carbon atoms and a polyhydric aliphatic alcohol, and 16 to 24 carbon atoms. At least one compound selected from the fatty acid amides.

  When the total content of the aliphatic alcohol, the oxyethylene alkyl ether, and the fatty acid derivative is 100% by mass, the aliphatic alcohol is 10 to 40% by mass, the oxyethylene alkyl ether is 30 to 80% by mass, And it is preferable to contain the said fatty-acid derivative in the ratio of 1-45 mass%.

The polyolefin-based resin is preferably a polyolefin-based synthetic fiber resin.
In another aspect of the present invention, when the total content of the polyolefin resin additive and the polyolefin resin is 100% by mass, the additive is 1 to 70% by mass, and the resin is 30 to 30% by mass. A polyolefin resin composition comprising 99% by mass is provided.

  In another aspect of the present invention, the polyolefin-based synthetic fiber is characterized in that the polyolefin-based resin additive is contained in a proportion of 1.0 to 7.0% by mass in the polyolefin-based synthetic fiber. A nonwoven fabric is provided.

  Further, another aspect of the present invention is the step 1 of mixing the polyolefin resin additive and the polyolefin resin to obtain a resin composition, and spinning the polyolefin synthetic fiber using the obtained resin composition. There is provided a method for producing a polyolefin-based synthetic fiber nonwoven fabric, which includes a step 2 for performing the process and a step 3 for joining the polyolefin-based synthetic fiber to form a nonwoven fabric.

  In the step 1, the polyolefin resin additive and the polyolefin resin are added so that the polyolefin resin additive is contained in the polyolefin synthetic fiber in a proportion of 1.0 to 7.0% by mass. It is preferable to mix.

  According to the present invention, hydrophilicity can be expressed particularly immediately after the production of the polyolefin resin.

(First embodiment)
First, a first embodiment that embodies an additive for polyolefin resin according to the present invention (hereinafter referred to as an additive) will be described. The additive of this embodiment contains the following aliphatic alcohol and the following oxyethylene alkyl ether.

The aliphatic alcohol is a monovalent aliphatic alcohol having 16 to 32 carbon atoms.
The oxyethylene alkyl ether is a compound in which ethylene oxide is added in an average ratio of less than 2 mol to 1 mol of a monovalent aliphatic alcohol having 12 to 26 carbon atoms.

  The aliphatic alcohol used for the additive of the present embodiment is the monovalent aliphatic alcohol having 16 to 32 carbon atoms described above. These aliphatic alcohols may be used alone or in combination of two or more. Among these, those having 18 to 26 carbon atoms are preferable. By setting the number of carbon atoms to 16 or more, the effect of the present invention can be improved. Further, when producing a nonwoven fabric, for example, when producing a nonwoven fabric using a spunbond method, it is possible to reduce smoke generation. Moreover, the durable hydrophilic property of a nonwoven fabric can be improved more. Moreover, the effect of this invention can be improved by making carbon number 32 or less. Moreover, the spot water absorption and durable hydrophilic property of a nonwoven fabric can be improved more.

  Specific examples of the monohydric aliphatic alcohol having 16 to 32 carbon atoms include hexadecyl alcohol, octadecyl alcohol, octadecenyl alcohol, isooctadecyl alcohol, docosyl alcohol, tetracosyl alcohol, triacontyl alcohol and the like. Can be mentioned. Specific examples of the monovalent aliphatic alcohol having 18 to 26 carbon atoms include octadecyl alcohol, octadecenyl alcohol, isooctadecyl alcohol, docosyl alcohol, tetracosyl alcohol and the like.

  As described above, the oxyethylene alkyl ether used for the additive of the present embodiment is a compound in which ethylene oxide is added to 1 mol of a monohydric aliphatic alcohol having 12 to 26 carbon atoms at an average ratio of less than 2 mol. These oxyethylene alkyl ethers may be used alone or in combination of two or more. Among these, a compound in which ethylene oxide is added to 1 mol of a monohydric aliphatic alcohol having 16 to 24 carbon atoms at an average ratio of less than 2 mol is preferable. By setting the carbon number to 12 or more, the effect of the present invention can be improved. Further, when producing a nonwoven fabric, for example, when producing a nonwoven fabric using a spunbond method, it is possible to reduce smoke generation. Moreover, the durable hydrophilic property of a nonwoven fabric can be improved more. Moreover, the effect of this invention can be improved by making carbon number 26 or less. Moreover, the spot water absorption and durable hydrophilic property of a nonwoven fabric can be improved more. The number of moles of ethylene oxide added to the additive of this embodiment is less than 2.0 moles on average, and preferably less than 1.5 moles on average. The effect of the present invention can be improved by adding ethylene oxide at an average ratio of less than 2.0 mol. Further, when producing a nonwoven fabric, for example, when producing a nonwoven fabric using the spunbond method, it is possible to reduce smoke generation, and to improve the uniformity of the additive.

  Specific examples of monohydric aliphatic alcohols having 12 to 26 carbon atoms that are raw materials for oxyethylene alkyl ether include, for example, dodecyl alcohol, tridecyl alcohol, isotridecyl alcohol, tetradecyl alcohol, hexadecyl alcohol, octadecyl alcohol, octa Examples include decenyl alcohol, isooctadecyl alcohol, docosyl alcohol, tetracosyl alcohol, and hexacosyl alcohol. Specific examples of the monohydric aliphatic alcohol having 16 to 24 carbon atoms include hexadecyl alcohol, octadecyl alcohol, octadecenyl alcohol, isooctadecyl alcohol, docosyl alcohol, tetracosyl alcohol and the like.

  In the additive of the present embodiment, the content ratio of the above-described aliphatic alcohol and oxyethylene alkyl ether in the additive is not particularly limited. When the total content of the aliphatic alcohol and the oxyethylene alkyl ether described above is 100% by mass, the aliphatic alcohol is contained in an amount of 1 to 70% by mass and the oxyethylene alkyl ether is contained in a proportion of 30 to 99% by mass. Is preferred. By defining within this range, the effect of the present invention can be further improved.

  The additive of the present embodiment preferably further comprises the following fatty acid derivative. Examples of fatty acid derivatives include ester compounds of monocarboxylic acids having 16 to 24 carbon atoms and monovalent aliphatic alcohols, ester compounds of monocarboxylic acids having 16 to 24 carbon atoms and polyhydric aliphatic alcohols, and carbon numbers of 16 to It is at least one compound selected from 24 fatty acid amides. These fatty acid derivatives may be used individually by 1 type, and may be used in combination of 2 or more type. By blending such an aliphatic derivative, it is possible to reduce fuming when manufacturing a nonwoven fabric, for example, when manufacturing a nonwoven fabric using a spunbond method.

  Examples of the monocarboxylic acid having 16 to 24 carbon atoms used as a raw material for the fatty acid derivative include hexadecanoic acid, octadecanoic acid, octadecenoic acid, isooctadecanoic acid, docosanoic acid, and tetracosanoic acid.

  Examples of the monohydric aliphatic alcohol used as a raw material for the fatty acid derivative include methyl alcohol, ethyl alcohol, propyl alcohol, butyl alcohol, hexyl alcohol, octyl alcohol, dodecyl alcohol, tridecyl alcohol, isotridecyl alcohol, tetradecyl alcohol, Examples include hexadecyl alcohol, octadecyl alcohol, octadecenyl alcohol, isooctadecyl alcohol, docosyl alcohol, tetracosyl alcohol, hexacosyl alcohol and the like.

  Examples of the polyhydric aliphatic alcohol that is a raw material for the fatty acid derivative include ethylene glycol, propylene glycol, glycerin, pentaerythritol, sorbitol, sorbitan, and the like.

  Examples of the fatty acid amide having 16 to 24 carbon atoms include hexadecanoic acid amide, octadecanoic acid amide, octadecenoic acid amide, isooctadecanoic acid amide, docosanoic acid amide, docosenoic acid amide, and tetracosanoic acid amide.

  In the additive of the present embodiment, the content ratio of the above-described aliphatic alcohol, oxyethylene alkyl ether, and fatty acid derivative in the additive is not particularly limited. When the total content of the aliphatic alcohol, the oxyethylene alkyl ether, and the fatty acid derivative is 100% by mass, the aliphatic alcohol is 10 to 40% by mass, the oxyethylene alkyl ether is 30 to 80% by mass, and the fatty acid derivative. It is preferable to contain 1 to 45 mass%. By defining within this range, the effect of the present invention can be further improved.

There is no restriction | limiting in particular regarding the use of the polyolefin-type resin to which the additive of this embodiment is applied. It is preferably a polyolefin-based synthetic fiber resin.
(Second Embodiment)
Next, a second embodiment in which the polyolefin resin composition according to the present invention (hereinafter referred to as a resin composition) is embodied will be described. The resin composition of the present embodiment is 1 to 70% by mass of the additive and 30 to 99 of the resin when the total content of the additive and the polyolefin resin in the first embodiment is 100% by mass. It contains by the ratio of the mass.

  Examples of the polyolefin resin include high density polyethylene, low density polyethylene, polypropylene, and polybutylene. These polyolefin resin may be used individually by 1 type, and may be used in combination of 2 or more type.

  The resin composition of the present embodiment is not particularly limited in its form, but is preferably a master batch. A master batch for polyolefin synthetic fibers is more preferable. The uniformity of the additive in the nonwoven fabric can be further improved during the production of the nonwoven fabric using the master batch, for example, during the production of the nonwoven fabric using the spunbond method.

(Third embodiment)
A third embodiment embodying a polyolefin-based synthetic fiber nonwoven fabric (hereinafter referred to as a synthetic fiber nonwoven fabric) according to this embodiment will be described. The synthetic fiber nonwoven fabric of the present embodiment is one in which the additive of the first embodiment is contained in the synthetic fiber nonwoven fabric in a proportion of 1.0 to 7.0% by mass.

  Although it does not specifically limit as a kind of nonwoven fabric which comprises the synthetic fiber nonwoven fabric of this embodiment, For example, the composite nonwoven fabric of a spun bond, a melt blown, a spun bond, and a melt blown etc. are mentioned.

(Fourth embodiment)
Finally, a fourth embodiment in which the method for producing a polyolefin-based synthetic fiber nonwoven fabric of the present invention (hereinafter referred to as a method for producing a synthetic fiber nonwoven fabric) is embodied will be described. The manufacturing method of the synthetic fiber nonwoven fabric of this embodiment is the process 1 which mixes the additive of 1st Embodiment, and polyolefin resin, and obtains a resin composition, and polyolefin synthetic fiber using the obtained resin composition The process 2 and the process 3 which join the said polyolefin-type synthetic fiber and make it a nonwoven fabric are included.

  In Step 1 of mixing the additive of the first embodiment and the polyolefin-based resin, the additive of the first embodiment is contained in the polyolefin-based synthetic fiber in a proportion of 1.0 to 7.0% by mass. Thus, the step of mixing the additive of the first embodiment and the polyolefin resin is preferable. With such a configuration, it is possible to reduce fuming when manufacturing a nonwoven fabric, for example, when manufacturing a nonwoven fabric using a spunbond method. Moreover, an additive can be kneaded uniformly in this process.

It does not specifically limit as a manufacturing method of the synthetic fiber which comprises a synthetic fiber nonwoven fabric, A well-known manufacturing method is applicable. Examples thereof include melt spinning.
According to the additive, resin composition, synthetic fiber nonwoven fabric, and synthetic fiber nonwoven fabric production method of the above embodiment, the following effects can be obtained.

  (1) In the above embodiment, ethylene oxide is added to 1 mol of monohydric aliphatic alcohol having 16 to 32 carbon atoms and monohydric aliphatic alcohol having 12 to 26 carbon atoms in an additive at a ratio of less than 2 mol on average. The combined oxyethylene alkyl ether was used.

  Therefore, hydrophilicity can be expressed immediately after the production of the polyolefin resin. Furthermore, excellent absorption characteristics such as good spot water absorption and durable hydrophilicity that quickly absorbs body fluids can be imparted.

Moreover, smoke can be reduced during the production of a nonwoven fabric, for example, during the production of a nonwoven fabric using a spunbond method. Moreover, an additive can be kneaded uniformly in this process.
In addition, you may change the said embodiment as follows.

  The additive of the above embodiment includes a binder, an antioxidant, an ultraviolet absorber, etc. as a stabilizer or antistatic agent for maintaining the quality of the additive within a range that does not impair the effects of the present invention. You may mix | blend the component normally used for an additive.

  Hereinafter, in order to make the configuration and effects of the present invention more specific, examples and the like will be described. However, 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 additives for polyolefin resins)
Preparation of additive for polyolefin resin (Example 1) Octadecyl alcohol (A-1) 2.0 kg, monooxyethylene octadecyl ether (B-1) 6.0 kg and cis-13-docosenoamide (C-1 ) 2.0 kg was dissolved by heating at 80 ° C. and mixed uniformly to obtain an additive for polyolefin resin.

-Preparation of polyolefin resin additive (Examples 2-19 and Comparative Examples 1-8) Similar to the preparation of the polyolefin resin additive of Example 1, Examples 2-19 and Comparative Examples 1-8 Additives were prepared. Table 1 shows the types of aliphatic alcohol, oxyethylene alkyl ether, and fatty acid derivative used in each example, and the content ratio (%) of each component in the additive.

In Table 1,
A-1: Octadecyl alcohol,
A-2: docosyl alcohol,
A-3: Tetracosyl alcohol,
A-4: Hexadecyl alcohol,
A-5: Triacontyl alcohol,
ra-1: octyl alcohol,
ra-2: tetracontyl alcohol,
B-1: Monooxyethylene octadecyl ether (average added mole number of ethylene oxide 1.0),
B-2: monooxyethylene docosyl ether (average added mole number of ethylene oxide 1.0),
B-3: monooxyethylene tetracosyl ether (average added mole number of ethylene oxide 1.0),
B-4: Oxyethylene octadecyl ether (average added mole number of ethylene oxide 1.35),
B-5: oxyethylene docosyl ether (average number of moles of ethylene oxide added 1.35),
B-6: monooxyethylene dodecyl ether (average added mole number of ethylene oxide 1.0),
B-7: monooxyethylene hexacosyl ether (average added mole number of ethylene oxide 1.0),
B-8: oxyethylene octadecyl ether (average added mole number of ethylene oxide 1.60),
B-9: oxyethylene octadecyl ether (average added mole number of ethylene oxide 1.95),
rb-1: monooxyethylene octyl ether (average added mole number of ethylene oxide 1.0),
rb-2: monooxyethylene triacontyl ether (average added mole number of ethylene oxide 1.0),
rb-3: oxyethylene octadecyl ether (average added mole number of ethylene oxide 3.20),
rb-4: oxyethylene octadecyl ether (average added mole number of ethylene oxide 2.40),
rb-5: oxyethylene octadecyl ether (average added mole number of ethylene oxide 3.68),
C-1: cis-13-docosenoic acid amide,
C-2: Octadecyl octadecylate,
C-3: sorbitan monooctadecylate,
C-4: glycerin monooctadecylate,
rc-1: dodecyl dodecylate,
rc-2: dotriacontanamid,
rc-3: polyoxyethylene (10 mol) octadecanamide,
Indicates.

Test Category 2 (Preparation of polyolefin resin composition and preparation of polyolefin synthetic fiber nonwoven fabric and evaluation of nonwoven fabric manufacturability)
Preparation of polyolefin resin compositions (Examples 1 to 18 and Comparative Examples 1 to 8) Polypropylene resin (MFR = MFR = 0.0 kg) for polyolefin resin additive 10.0 kg of each example prepared in Test Category 1 30) A master batch which is a polyolefin resin composition containing 50% by mass of an additive for polyolefin resin was obtained by mixing with 10.0 kg and heating and melting to 200 ° C. with an extruder.

-Preparation of polyolefin resin composition (Example 19) Additive for polyolefin resin by mixing 10.0 kg of polyolefin resin additive prepared in Test Category 1 with 10.0 kg of polypropylene resin (MFR = 30) The mixture which is a polyolefin-type resin composition containing 50 mass% was obtained.

-Preparation of polyolefin-based synthetic fiber nonwoven fabric 4.0% by mass of polyolefin resin composition containing 50% by mass of the additive for polyolefin resin of each example prepared as described above (2. It was mixed with polypropylene resin (MFR = 30) so as to be 0% by mass). Furthermore, this mixture was melt-spun at 240 ° C. and heat embossed roller processing to prepare a 20 gsm polypropylene spunbond nonwoven fabric (synthetic fiber nonwoven fabric). As the manufacturability evaluation of the synthetic fiber nonwoven fabric, the following smoke evaluation and uniformity evaluation were performed. As the evaluation of the synthetic fiber nonwoven fabric itself, the following hydrophilicity, spot water absorption, and durable hydrophilicity were evaluated as described below.

  In Table 1, the addition amount (%) indicates the blending amount (%) of the polyolefin resin additive in the synthetic fiber nonwoven fabric. The number of moles of ethylene oxide added to the oxyethylene alkyl ether was calculated by using an Agilent DB-1 122-1032 column in an Agilent 7890B GC System.

-Evaluation of smoke generation When manufacturing the above-mentioned spunbonded nonwoven fabric, the presence or absence of smoke was judged according to the following evaluation criteria.
・ Smoke evaluation criteria A: Smoke is slightly seen, but very little.
○: Smoke is seen but little.
X: Much fuming and spinning is difficult.

-Evaluation of uniformity It was judged by the following evaluation criteria that the additive for polyolefin resin was uniformly added when the spunbonded nonwoven fabric was produced.

-Evaluation criteria for uniformity: No fiber breakage was observed during spinning, the fiber thickness was uniform, and the additive was added uniformly.
○: Although fiber breakage is not observed during spinning, the additive is not mixed uniformly, and thus the fiber thickness is uneven.
X: Since the additive is not added uniformly, fiber breakage frequently occurs.

Test Category 3 (Evaluation of polyolefin synthetic fiber nonwoven fabric)
-Evaluation of polyolefin synthetic fiber nonwoven fabric The nonwoven fabric evaluation was performed using the above-mentioned spunbond nonwoven fabric. As the nonwoven fabric evaluation items, hydrophilicity immediately after production, spot water absorption, and durable hydrophilicity evaluation were performed.

・ Evaluation of hydrophilicity immediately after production Place the spunbonded nonwoven fabric on a horizontal plate immediately after preparation, and add 0.4 ml of 0.9% physiological saline dropwise from 10 mm height using a burette to completely absorb. The time required until it was done was measured and judged according to the following evaluation criteria.

-Hydrophilic evaluation criteria immediately after production A: Time required for water permeation is less than 1 second.
○: Time required for water permeation is 1 second or more and less than 3 seconds.
X: Time required for water permeation is 3 seconds or more.

-Evaluation of spot water absorption The above-mentioned spunbonded nonwoven fabric was conditioned at 20 ° C in a constant temperature room of 60% RH for 24 hours. Then, it put on the horizontal board and 0.05 ml of water droplets colored blue were dripped using a syringe from a height of 10 mm to absorb water. Thereafter, the length in the fiber direction and the fiber vertical direction was measured for the dropping trace, and judged according to the following evaluation criteria.

-Evaluation standard of spot water absorption A: Both the fiber direction and the fiber vertical direction are less than 10 mm.
○: The lengths in the fiber direction and the fiber vertical direction are both 10 mm or more and less than 20 mm.
X: The length in either the fiber direction or the fiber vertical direction is 20 mm or more.

Evaluation of Durable Hydrophilicity The spunbond nonwoven fabric produced was cut into small pieces of 10 cm × 10 cm and conditioned for 24 hours in a constant temperature room at 60 ° C. at 20 ° C. Then, place a non-woven fabric with humidity control on 5 sheets of filter paper, and stand a cylinder with an inner diameter of 1 cm with both ends open vertically in the center, and inject 5 ml of 0.9% physiological saline into this cylinder. The time until it was completely absorbed by the nonwoven fabric was measured. Thereafter, the nonwoven fabric was taken out and dried by blowing at 40 ° C. for 90 minutes, and the above water permeability evaluation was repeated three times in total. About the 3rd durable hydrophilic property, it judged on the following evaluation criteria.

-Durability hydrophilicity evaluation standard A: Less than 3 seconds is required for the physiological saline to be absorbed.
○: The time required for the physiological saline to be absorbed is 3 seconds or more and less than 5 seconds.
X: Time required for the physiological saline to be absorbed is 5 seconds or more.

  As is clear from the results in Table 1, according to the present invention, there is little fuming during the production of the nonwoven fabric, and it is possible to knead uniformly. Moreover, hydrophilicity is expressed especially immediately after manufacture. Furthermore, there is an effect that good spot water absorption and durable hydrophilicity can be imparted.

Claims (12)

A polyolefin resin additive comprising the following aliphatic alcohol and the following oxyethylene alkyl ether.
Aliphatic alcohol: monovalent aliphatic alcohol having 16 to 32 carbon atoms.
Oxyethylene alkyl ether: A compound in which ethylene oxide is added at an average ratio of less than 2 moles per mole of monohydric aliphatic alcohol having 12 to 26 carbon atoms.   The polyolefin resin additive according to claim 1, wherein the aliphatic alcohol is a monovalent aliphatic alcohol having 18 to 26 carbon atoms.   The polyolefin resin according to claim 1 or 2, wherein the oxyethylene alkyl ether is a compound in which ethylene oxide is added at an average ratio of less than 2 moles to 1 mole of a monohydric aliphatic alcohol having 16 to 24 carbon atoms. Additives.   The polyolefin according to any one of claims 1 to 3, wherein the oxyethylene alkyl ether is a compound in which ethylene oxide is added at an average ratio of less than 1.5 mol to 1 mol of the monohydric aliphatic alcohol. -Based resin additive.   When the total content of the aliphatic alcohol and the oxyethylene alkyl ether is 100% by mass, the aliphatic alcohol is contained at 1 to 70% by mass, and the oxyethylene alkyl ether is contained at a rate of 30 to 99% by mass. The additive for polyolefin resin according to any one of claims 1 to 4. Furthermore, the additive for polyolefin resin as described in any one of Claims 1-4 containing the following fatty acid derivative.
Fatty acid derivatives: ester compounds of monocarboxylic acids having 16 to 24 carbon atoms and monohydric aliphatic alcohols, ester compounds of monocarboxylic acids having 16 to 24 carbon atoms and polyhydric aliphatic alcohols, and those having 16 to 24 carbon atoms At least one compound selected from fatty acid amides;   When the total content of the aliphatic alcohol, the oxyethylene alkyl ether, and the fatty acid derivative is 100% by mass, the aliphatic alcohol is 10 to 40% by mass, the oxyethylene alkyl ether is 30 to 80% by mass, And the additive for polyolefin resin of Claim 6 which contains the said fatty-acid derivative in the ratio of 1-45 mass%.   The said polyolefin resin is resin for polyolefin synthetic fibers, The additive for polyolefin resins as described in any one of Claims 1-7.   When the polyolefin resin additive according to any one of claims 1 to 8 and the total content of the polyolefin resin are 100% by mass, the polyolefin resin additive is 1 to 70% by mass, And a polyolefin resin composition comprising 30 to 99% by mass of the polyolefin resin.   The polyolefin resin, wherein the polyolefin resin additive according to any one of claims 1 to 8 is contained in a polyolefin synthetic fiber in a proportion of 1.0 to 7.0 mass%. Synthetic fiber nonwoven fabric.   The process 1 which mixes the polyolefin resin additive and polyolefin resin as described in any one of Claims 1-8, and a polyolefin resin, and a polyolefin synthetic fiber using the obtained resin composition A process for producing a polyolefin-based synthetic fiber nonwoven fabric, comprising: a step 2 for spinning a fiber; and a step 3 for joining the polyolefin-based synthetic fiber into a nonwoven fabric.   In the step 1, the polyolefin resin additive and the polyolefin resin are added so that the polyolefin resin additive is contained in the polyolefin synthetic fiber in a proportion of 1.0 to 7.0% by mass. The manufacturing method of the polyolefin-type synthetic fiber nonwoven fabric of Claim 11 mixed.