JPWO2011162073A1 - Synthetic fiber treatment agent for airbag, synthetic fiber filament for airbag, and base fabric for airbag - Google Patents

Abstract

An object of the present invention is obtained by using an air bag synthetic fiber treatment agent capable of imparting excellent strength and airtightness to an air bag base fabric, an air bag synthetic fiber filament provided with the treatment agent, and the filament. It is in providing the base fabric for airbags. The present invention is at least one polyvalent ester selected from an ester of an aliphatic polyhydric alcohol and a fatty acid and an ester of an aliphatic monohydric alcohol and an aliphatic polycarboxylic acid, and has a molecular weight of 200 to 1300. It is an ester having at least one aromatic ring selected from a certain ester compound (A), an ester of an aromatic carboxylic acid and an alcohol, and an ester of an aromatic alcohol and a carboxylic acid, and has a molecular weight of 200 to 2600 The synthetic fiber treatment for an air bag which contains an ester compound (B) essential and the weight ratio (A / B) of the ester compound (A) and the ester compound (B) is 1/1 to 40/1. It is an agent. [Selection figure] None

Description

  The present invention relates to a synthetic fiber treatment agent for airbags, a synthetic fiber filament for airbags, and a base fabric for airbags.

  In recent years, an airbag system has been increasingly installed as an automobile occupant protection safety device. In addition to conventional driver and passenger airbags, the mounting ratio of side airbags, knee airbags, and the like is also improved. In recent years, inflatable curtain airbags have been rapidly installed to protect passengers in the event of a side collision.

  Driver airbags, passenger airbags, side airbags, and knee airbags are formed by forming a heat-resistant polymer film on one side of a flat woven fabric, then cutting it out into a circle and stacking it so that the coating faces each other. Sewn items are used. Such a bag is rapidly inflated by high-pressure gas supplied from the gas generator due to a shock such as an accident, and restrains the occupant. At the same time, in order to absorb the impact between the occupant and the bag, the gas is designed to be released so that the internal pressure is instantaneously reduced. Degassing after the deployment of the bag is performed by controlling the air permeability of the bag base fabric by using a vent hole in a coated airbag and by using a non-coated airbag (see Patent Document 1).

  The inflatable curtain airbag is connected to a gas generator connected to a sensor that senses when the vehicle collides or rolls over, and is usually composed of a plurality of elongated bags. The inflatable curtain airbag is designed so that the inner pressure is maintained for several seconds to 10 seconds after the bag is deployed, and the bag becomes a cushion to protect the occupant even if the vehicle rolls over. In other words, inflatable curtain airbags are usually used by further improving the airtightness by coating the elastomer resin on the surface of a high-density fabric that has a sufficiently low air permeability even in a non-coated state that is sewn into a bag or bag shape. (See Patent Document 2).

  These airbags are required to be compatible with characteristics such as strength, airtightness, storage property, safety and low cost. In particular, inflatable curtain airbags are required to have airtightness and storage. In order to improve the air tightness and storage required for these airbags, the airbags need to be sewn compactly and firmly with a small seam allowance. By increasing the sliding resistance of the airbag base fabric, it is possible to obtain the high stitchability required for such an airbag.

  In general, the airbag fabric is obtained through a scouring process after weaving synthetic fiber filaments to which a synthetic fiber treatment agent has been applied using a water jet loom loom or a known mechanical loom. For example, Patent Document 3 has been proposed as a treatment agent for synthetic fibers related to an airbag base fabric obtained by a water jet loom loom. This treating agent for synthetic fibers increases the confounding property and entanglement retention property of each single yarn by adjusting the coefficient of friction between each single yarn of the synthetic fiber, and improves the converging property of the original yarn (enhances the yarn-making property). The purpose of the invention is to improve the weaving property by water jet loom weaving, and to efficiently deoil in the scouring step after weaving synthetic fibers. In other words, this synthetic fiber treatment agent is intended to be removed by scouring after improving the yarn-making property and weaving property, and the strength and airtightness of the airbag fabric itself can be improved. There wasn't.

Japanese Unexamined Patent Publication No. 7-164988 Japanese Unexamined Patent Publication No. 2003-166144 Japanese Unexamined Patent Publication No. 5-148765

  An object of the present invention is obtained by using an air bag synthetic fiber treatment agent capable of imparting excellent strength and airtightness to an air bag base fabric, an air bag synthetic fiber filament provided with the treatment agent, and the filament. It is providing the base fabric for airbags.

  As a result of intensive studies to solve the above problems, the inventors of the present invention have woven a synthetic fiber filament to which a synthetic fiber treating agent has been applied, and then a scouring step (in the case of water jet loom weaving, there is no scouring step). In the air bag base fabric obtained through the above process, the friction characteristics of the treating agent component remaining on the base fabric without being removed by the water pressure during the scouring process or during water jet loom weaving It has been found to have an effect on strength and airtightness. Furthermore, it has been found that if the synthetic fiber treatment agent essentially contains the specific ester compounds (A) and (B) at a specific ratio, the strength and airtightness of the airbag fabric are improved.

  That is, the present invention is at least one polyvalent ester selected from an ester of an aliphatic polyhydric alcohol and a fatty acid and an ester of an aliphatic monohydric alcohol and an aliphatic polycarboxylic acid, and has a molecular weight of 200 to 200. 1300 is an ester compound (A) having at least one aromatic ring selected from an ester of an aromatic carboxylic acid and an alcohol and an ester of an aromatic alcohol and a carboxylic acid, and has a molecular weight of 200 to 2600 An ester compound (B) that is essential, and the weight ratio (A / B) of the ester compound (A) to the ester compound (B) is 1/1 to 40/1. It is a fiber treatment agent.

  The ester compound (A) is preferably a compound having an unsaturated bond. Moreover, it is preferable that the said ester compound (A) is a compound which has a 3 or more ester group in a molecule | numerator. The ester compound (A) is preferably an ester of a trihydric or higher aliphatic polyhydric alcohol and an unsaturated fatty acid having 8 to 24 carbon atoms.

  The ester compound (B) is preferably a compound having two or more ester groups in the molecule. The ester compound (B) is preferably an ester of an aromatic carboxylic acid and an aliphatic alcohol having 8 to 24 carbon atoms.

  It is preferable that the weight ratio of the ester compound (A) in the nonvolatile content of the treating agent is 30 to 80% by weight, and the weight ratio of the ester compound (B) is 2 to 30% by weight.

The synthetic fiber filament for airbag of the present invention is obtained by adding the above-mentioned synthetic fiber treatment agent for airbag to the synthetic fiber filament.
The synthetic fiber filament is preferably a nylon 6,6, nylon 6, or polyester synthetic fiber filament.

  The base fabric for an air bag of the present invention is obtained by weaving the above synthetic fiber filament.

  The synthetic fiber treating agent for an airbag of the present invention can impart excellent strength and airtightness to an airbag base fabric. According to the synthetic fiber filament for an airbag of the present invention to which the treatment agent is applied, an airbag base fabric excellent in strength and airtightness can be obtained. The base fabric for an air bag of the present invention is excellent in strength and airtightness.

Schematic diagram showing a device for measuring the static frictional force between yarns

  The synthetic fiber treating agent for an airbag of the present invention essentially contains the specific ester compounds (A) and (B) at a specific ratio. This will be described in detail below.

[Ester compound (A)]
The ester compound (A) of the present invention contains at least one polyvalent alcohol selected from an ester (A1) of an aliphatic polyhydric alcohol and a fatty acid and an ester (A2) of an aliphatic monohydric alcohol and an aliphatic polycarboxylic acid. And a molecular weight of 200 to 1300. The ester compound (A) is a polyvalent ester having two or more ester groups in the molecule, and is a compound having no polyoxyalkylene group in the molecule. You may use 1 type (s) or 2 or more types of ester compounds (A).
The ester compound (A) is a component that suppresses high friction due to the ester compound (B) to be described later, and provides lubricity and convergence necessary for yarn production and weaving. Furthermore, since the ester compound (A) has an action of reducing the slip resistance of the airbag base fabric, it is easily removed by scouring after weaving the airbag base fabric or water pressure during weaving the water jet loom (hereinafter referred to as scouring property). Is necessary). Esters containing polyoxyalkylene groups are not preferred because of increased friction.

The aliphatic polyhydric alcohol constituting the ester (A1) is not particularly limited as long as it is divalent or higher, and one or two or more types can be used. The aliphatic polyhydric alcohol is preferably trivalent or more, more preferably 3 to 4 from the viewpoint of further suppressing high friction due to the ester compound (B) and further improving the lubricity and convergence during spinning and weaving. Trivalent is more preferable. In the case of an aliphatic monohydric alcohol, high friction due to the ester compound (B) described later cannot be suppressed, so that the yarn making and weaving passability cannot be satisfied.
Examples of the aliphatic polyhydric alcohol include ethylene glycol, diethylene glycol, triethylene glycol, tetraethylene glycol, propylene glycol, dipropylene glycol, tripropylene glycol, 1,2-butanediol, 1,3-butanediol, 1,4- Butanediol, 2-methyl-1,3-propanediol, 1,5-pentanediol, 1,6-hexanediol, neopentyl glycol, cyclohexanediol, cyclohexanedimethanol, glycerin, trimethylolpropane, pentaerythritol, erythritol, Examples include diglycerin, sorbitan, sorbitol, ditrimethylolpropane, dipentaerythritol, triglycerin, tetraglycerin, and sucrose. Among these, glycerin, trimethylolpropane, pentaerythritol, erythritol, diglycerin, sorbitan, sorbitol, ditrimethylolpropane, dipentaerythritol, and sucrose are preferable, and glycerin, trimethylolpropane, pentaerythritol, erythritol, diglycerin, sorbitan Are more preferable, and glycerin and trimethylolpropane are more preferable.

  The fatty acid (aliphatic monovalent carboxylic acid) constituting the ester (A1) may be saturated or unsaturated. The fatty acid is preferably an unsaturated fatty acid from the viewpoint of scourability. There is no particular limitation on the number of unsaturated bonds, but when there are two or more, one is preferable because deterioration proceeds due to oxidation and the treatment agent is thickened to impair scourability. The number of carbon atoms of the fatty acid is preferably 8 to 24, more preferably 14 to 24, and still more preferably 18 to 22 from the standpoints of both the spinning property and the scourability. 1 type, or 2 or more types may be used for a fatty acid, and a saturated fatty acid and an unsaturated fatty acid may be used together.

  Fatty acids include butyric acid, crotonic acid, valeric acid, caproic acid, enanthic acid, caprylic acid, pelargonic acid, capric acid, lauric acid, myristic acid, myristoleic acid, pentadecylic acid, palmitic acid, palmitoleic acid, isocetylic acid, margarine Acid, stearic acid, isostearic acid, oleic acid, elaidic acid, vaccenic acid, linoleic acid, linolenic acid, tuberculostearic acid, arachidic acid, isoicosanoic acid, gadoleic acid, eicosenoic acid, behenic acid, isodocosanoic acid, erucic acid, lignoserine Examples include acids, isotetradocosanoic acid, nervonic acid, serotic acid, montanic acid, melicic acid and the like. Among these, caprylic acid, pelargonic acid, capric acid, lauric acid, myristic acid, myristic acid, pentadecylic acid, palmitic acid, palmitoleic acid, isocetyl acid, margaric acid, stearic acid, isostearic acid, oleic acid, elaidic acid, Vaccenoic acid, linoleic acid, linolenic acid, tuberculostearic acid, arachidic acid, isoicosanoic acid, gadoleic acid, eicosenoic acid, behenic acid, erucic acid, lignoceric acid, isotetradocosanoic acid, nervonic acid are preferred, myristoleic acid, Palmitoleic acid, oleic acid, elaidic acid, vaccenic acid, gadoleic acid, eicosenoic acid, erucic acid and nervonic acid are more preferred, and oleic acid, elaidic acid, vaccenic acid, gadoleic acid, eicosenoic acid and erucic acid are more preferred.

  The aliphatic monohydric alcohol constituting the ester (A2) is not particularly limited, and one kind or two or more kinds can be used. The aliphatic monohydric alcohol may be saturated or unsaturated. The aliphatic monohydric alcohol is preferably an unsaturated aliphatic monohydric alcohol from the viewpoint of scourability. There is no particular limitation on the number of unsaturated bonds, but when there are two or more, one is preferable because deterioration proceeds due to oxidation and the treatment agent is thickened to impair scourability. The number of carbon atoms of the aliphatic monohydric alcohol is preferably 8 to 24, more preferably 14 to 24, and still more preferably 18 to 22 from the standpoints of both the spinning performance and the scourability. One or more aliphatic monohydric alcohols may be used, and a saturated aliphatic monohydric alcohol and an unsaturated aliphatic monohydric alcohol may be used in combination.

  Examples of the aliphatic monohydric alcohol include octyl alcohol, isooctyl alcohol, lauryl alcohol, myristyl alcohol, myristol alcohol, cetyl alcohol, isocetyl alcohol, palmitoleyl alcohol, stearyl alcohol, isostearyl alcohol, oleyl alcohol, elaidyl alcohol, Bacenyl alcohol, gadreyl alcohol, argidinyl alcohol, isoiconanyl alcohol, eicosenoyl alcohol, behenyl alcohol, isodocosanyl alcohol, ercanyl alcohol, lignocerinyl alcohol, isotetradocosanyl alcohol, nerbonyl alcohol, Examples include serotonyl alcohol, montanyl alcohol, and melinyl alcohol. Among these, octyl alcohol, isooctyl alcohol, lauryl alcohol, myristyl alcohol, myristol alcohol, cetyl alcohol, isocetyl alcohol, palmitoleyl alcohol, stearyl alcohol, isostearyl alcohol, oleyl alcohol, elaidyl alcohol, vaccenyl alcohol Gadolyl alcohol, argidinyl alcohol, isoicosanyl alcohol, eicosenoyl alcohol, behenyl alcohol, isodocosanyl alcohol, ercanyl alcohol, lignocellinyl alcohol, isotetradocosanyl alcohol, nerbonyl alcohol are preferred, and myris Trail alcohol, palmitoleyl alcohol, oleyl alcohol, elaidyl alcohol, baxenyl Alcohol, gadoleyl alcohol, eicosyl cell noil alcohol, erucic alkenyl alcohol, more preferably flannel isobornyl alcohol, oleyl alcohol, elaidyl alcohol, Ba habit alkenyl alcohol, gadoleyl alcohol, eicosyl cell noil alcohol, erucic nil alcohol more preferred.

The aliphatic polyvalent carboxylic acid constituting the ester (A2) is not particularly limited as long as it is divalent or higher, and one or two or more types can be used. The aliphatic polyvalent carboxylic acid used in the present invention does not contain a sulfur-containing polyvalent carboxylic acid such as thiodipropionic acid. The aliphatic polyvalent carboxylic acid is more preferably divalent from the standpoint of further suppressing high friction due to the ester compound (B) and further improving the lubricity and convergence during spinning and weaving. Similarly, it is preferable that no hydroxyl group is contained in the molecule.
Aliphatic polycarboxylic acids include citric acid, isocitric acid, malic acid, aconitic acid, oxaloacetic acid, oxalosuccinic acid, succinic acid, fumaric acid, maleic acid, glutaric acid, adipic acid, pimelic acid, suberic acid, azelain An acid, sebacic acid, etc. are mentioned. Among these, aconitic acid, oxaloacetic acid, oxalosuccinic acid, succinic acid, fumaric acid, maleic acid, glutaric acid, adipic acid, pimelic acid, suberic acid, azelaic acid, and sebacic acid are preferred, and succinic acid, fumaric acid, maleic acid are preferred. Acid, glutaric acid, adipic acid, pimelic acid, suberic acid, azelaic acid, and sebacic acid are more preferable.

The molecular weight of the ester compound (A) is 200-1300. As a result, it becomes possible to stabilize the yarn-making property and perform high-strength drawing, and to obtain a high-strength synthetic fiber. The molecular weight is preferably 400 to 1300, more preferably 600 to 1000.
When the molecular weight is less than 200, the extreme pressure property of the synthetic fiber to which the treatment agent is applied is low, and an oil film is cut between the yarn and the drawing roller at the time of drawing, and the friction between the yarn and the drawing roller increases. As a result, the spinning property is lowered and the synthetic fiber cannot be stretched at a high magnification, and a high-strength synthetic fiber cannot be obtained. On the other hand, when the molecular weight exceeds 1300, the friction between the yarn and the drawing roller, that is, the friction against the metal becomes high, and the sliding between the roller surface and each single yarn of the synthetic fiber by high magnification drawing is not smoothly performed. As a result, single yarn breakage is likely to occur.
The viscosity (25 ° C.) of the ester compound (A) is preferably 40 to 90 mm ² / s from the viewpoint of suppressing high friction due to the ester compound (B) and improving lubricity and convergence during yarn production and weaving. 50-80 mm < ² > / s is more preferable and 60-70 mm < ² > / s is further more preferable.

The ester compound (A) is preferably one having three or more ester groups in the molecule from the viewpoint of suppressing high friction due to the ester compound (B) and improving lubricity and convergence during yarn production and weaving. Three is more preferable.
Moreover, it is preferable that an ester compound has an unsaturated bond in a molecule | numerator from the point of scourability. The number of unsaturated bonds is not particularly limited, but if there are two or more unsaturated bonds in the same alkyl chain, the deterioration proceeds due to the acid value and the treating agent is thickened to impair the scouring properties. One is preferred.

  Among the above-mentioned ester compounds (A), an ester (A1) of an aliphatic polyhydric alcohol and a fatty acid is preferable from the viewpoint of more exerting the above-described effects and cost, and among the esters (A1), trivalent or more An ester of an aliphatic polyhydric alcohol and an unsaturated fatty acid having 8 to 24 carbon atoms is more preferred, and an ester of an aliphatic trivalent alcohol and an unsaturated fatty acid having 18 to 22 carbon atoms is particularly preferred.

[Ester compound (B)]
The ester compound (B) of the present invention is an ester having at least one aromatic ring selected from an ester (B1) of an aromatic carboxylic acid and an alcohol and an ester (B2) of an aromatic alcohol and a carboxylic acid, And the molecular weight is 200-2600. The ester compound (B) is a compound having at least one aromatic ring in the molecule and having no polyoxyalkylene group in the molecule. 1 type (s) or 2 or more types may be used for an ester compound (B). The ester compound (B) is a component that enhances the slip resistance of the airbag base fabric, and is not easily removed by water pressure during scouring or water jet loom weaving after weaving the airbag base fabric (hereinafter sometimes referred to as persistence). )is necessary. By using such an ester compound (B) in combination with the above-described ester compound (A), it is possible to improve lubricity and convergence at the time of yarn production and weaving, and to further increase the slip resistance of the airbag base fabric. .

The aromatic carboxylic acid constituting the ester (B1) may be a monocarboxylic acid or a polyvalent carboxylic acid. You may use 1 type, or 2 or more types. Aromatic polyvalent carboxylic acids are preferred and aromatic trivalent carboxylic acids are more preferred from the standpoint of slip-off resistance and yarn production.
Examples of the aromatic carboxylic acid include benzoic acid, toluic acid, naphthoic acid, phthalic acid, isophthalic acid, terephthalic acid, salicylic acid, gallic acid, melittic acid, cinnamic acid, trimellitic acid and the like. Among these, trimellitic acid, phthalic acid, isophthalic acid, and terephthalic acid are preferable, and trimellitic acid is more preferable.

The alcohol constituting the ester (B1) may be a monohydric alcohol or a polyhydric alcohol. Moreover, any of aliphatic alcohol, alicyclic alcohol, and aromatic alcohol may be sufficient. You may use 1 type, or 2 or more types. Among these, monohydric alcohols are preferable, and aliphatic monohydric alcohols are more preferable.
The aliphatic monohydric alcohol is preferably saturated from the viewpoint of persistence. The aliphatic monohydric alcohol may be linear or branched. The number of carbon atoms of the aliphatic monohydric alcohol is preferably 8 to 24, more preferably 12 to 24, and still more preferably 18 to 24, from the standpoint of both the spinning performance and the persistence.

Monohydric alcohols include alkylbenzene alcohol, dialkylbenzene alcohol, octyl alcohol, isooctyl alcohol, lauryl alcohol, myristyl alcohol, myristol alcohol, cetyl alcohol, isocetyl alcohol, palmitoleyl alcohol, stearyl alcohol, isostearyl alcohol, oleyl alcohol , Elidyl alcohol, bacenyl alcohol, gadrel alcohol, argidinyl alcohol, isoicosanyl alcohol, eicosenoyl alcohol, behenyl alcohol, isodocosanyl alcohol, ercanyl alcohol, lignocerinyl alcohol, isotetradocosanyl Alcohol, nerbonyl alcohol, serotinyl alcohol, montanyl alcohol, meli Alkenyl alcohol. Among these, alkylbenzene alcohol, dialkylbenzene alcohol, octyl alcohol, isooctyl alcohol, lauryl alcohol, myristyl alcohol, myristol alcohol, cetyl alcohol, isocetyl alcohol, palmitoleyl alcohol, stearyl alcohol, isostearyl alcohol, oleyl alcohol, Erai Zyl alcohol, bacenyl alcohol, gadrel alcohol, argidinyl alcohol, isoicosanyl alcohol, eicosenoyl alcohol, behenyl alcohol, isodocosanyl alcohol, ercanyl alcohol, lignocerinyl alcohol, isotetradocosanyl alcohol, Nerbonyl alcohol is preferred, alkylbenzene alcohol, dialkylbenzene Lucol, lauryl alcohol, myristyl alcohol, cetyl alcohol, isocetyl alcohol, stearyl alcohol, isostearyl alcohol, argidinyl alcohol, isoicosanyl alcohol, behenyl alcohol, isodocosanyl alcohol, lignoserinyl alcohol, isotetradocosanyl alcohol Are more preferable, and alkylbenzene alcohol, dialkylbenzene alcohol, stearyl alcohol, isostearyl alcohol, argidinyl alcohol, isoicosanyl alcohol, behenyl alcohol, isodocosanyl alcohol, lignocerinyl alcohol, and isotetradocosanyl alcohol are more preferable.
Examples of the polyhydric alcohol include the aliphatic polyhydric alcohol described in the ester (A1) and the aromatic polyhydric alcohol described in the ester (B2).

The aromatic alcohol which comprises ester (B2) may use 1 type (s) or 2 or more types. Aromatic polyhydric alcohols are preferred and aromatic trihydric alcohols are more preferred from the standpoint of slip-off resistance and yarn production.
Examples of the aromatic alcohol include aromatic monohydric alcohols such as alkylbenzene alcohol, aromatic polyhydric alcohols such as dialkylbenzene alcohol, bisphenol A, bisphenol Z, and 1,3,5-trihydroxymethylbenzene. Among these, bisphenol A, bisphenol Z, and 1,3,5-trihydroxymethylbenzene are preferable, and 1,3,5-trihydroxymethylbenzene is more preferable.

  The carboxylic acid constituting the ester (B2) may be either an aliphatic carboxylic acid or an aromatic carboxylic acid. Either a monovalent carboxylic acid or a polyvalent carboxylic acid may be used. You may use 1 type, or 2 or more types. Among these, monovalent carboxylic acids are preferable, and fatty acids are more preferable. The fatty acid is preferably saturated from the viewpoint of persistence. The fatty acid may be linear or branched. The number of carbon atoms of the fatty acid is preferably 8 to 24, more preferably 12 to 24, and still more preferably 18 to 24, from the standpoint of both the yarn-making property and the persistence.

Monovalent carboxylic acids include alkylbenzene carboxylic acid, dialkylbenzene carboxylic acid, butyric acid, crotonic acid, valeric acid, caproic acid, enanthic acid, caprylic acid, pelargonic acid, capric acid, lauric acid, myristic acid, myristic acid, Pentadecylic acid, palmitic acid, palmitoleic acid, isocetyl acid, margaric acid, stearic acid, isostearic acid, oleic acid, elaidic acid, vaccenic acid, linoleic acid, linolenic acid, tuberculostearic acid, arachidic acid, isoicosanoic acid, gadoleic acid, Examples include eicosenoic acid, behenic acid, isodocosanoic acid, erucic acid, lignoceric acid, isotetradocosanoic acid, nervonic acid, serotic acid, montanic acid, melicic acid and the like. Among these, alkyl benzene carboxylic acid, dialkyl benzene carboxylic acid, caprylic acid, pelargonic acid, capric acid, lauric acid, myristic acid, myristoleic acid, pentadecylic acid, palmitic acid, palmitoleic acid, isocetyl acid, margaric acid, stearic acid, Isostearic acid, oleic acid, elaidic acid, vaccenic acid, linoleic acid, linolenic acid, tuberculostearic acid, arachidic acid, isoicosanoic acid, gadoleic acid, eicosenoic acid, behenic acid, isodocosanoic acid, erucic acid, lignoceric acid, isotetradoco Sanic acid, nervonic acid and the like are preferable, and alkylbenzene carboxylic acid, dialkylbenzene carboxylic acid, lauric acid, myristic acid, pentadecylic acid, palmitic acid, isocetylic acid, margaric acid, stearic acid, iso Tealic acid, tuberculostearic acid, arachidic acid, isoicosanoic acid, behenic acid, isodocosanoic acid, lignoceric acid, isotetradocosanoic acid, etc. are more preferred, alkylbenzene carboxylic acid, dialkylbenzene carboxylic acid, stearic acid, isostearic acid, tuberculosic More preferred are stearic acid, arachidic acid, isoicosanoic acid, behenic acid, isodocosanoic acid, lignoceric acid, isotetradocosanoic acid and the like.
Examples of the polyvalent carboxylic acid include the aliphatic polyvalent carboxylic acid described in the ester (A2) and the aromatic polyvalent carboxylic acid described in the ester (B1).

The molecular weight of the ester compound (B) is 200-2600. This makes it possible to achieve both the stability of the yarn production and the high resistance to slipping out of the fabric (edge comb resistance), and to obtain desirable characteristics as a synthetic fiber for an airbag. The molecular weight is preferably 400 to 2000, and more preferably 600 to 1500.
When the molecular weight is less than 200, the static frictional force between the warp and the weft of each warp and weft when the completed airbag base fabric is disassembled becomes low, and the base fabric sliding resistance (edge comb resistance) becomes small. If the molecular weight exceeds 2600, the friction between the yarn and the drawing roller, that is, the friction against the metal becomes high, and the sliding between the roller surface and each single yarn of the synthetic fiber by high magnification drawing cannot be performed smoothly. As a result, single yarn breakage is likely to occur.

  The ester compound (B) is preferably one having two or more ester groups in the molecule from the viewpoint of enhancing slipping resistance, and more preferably 2 to 3 from the viewpoint of the stability of yarn production.

  Among the ester compounds (B) described above, an ester (B1) of an aromatic carboxylic acid and an alcohol is preferable from the viewpoint of achieving both slipping resistance and yarn-making property. Among the esters (B1), an ester of an aromatic carboxylic acid and an aliphatic alcohol is preferable, an ester of an aromatic polyvalent carboxylic acid and an aliphatic monohydric alcohol is preferable, and then an aromatic trivalent carboxylic acid and Esters with aliphatic monohydric alcohols are preferred, then aromatic trivalent carboxylic acids and aliphatic monohydric alcohols having 8 to 24 carbon atoms are preferred, followed by aromatic trivalent carboxylic acids and fatty acids having 12 to 24 carbon atoms. A monovalent alcohol is preferable, and an aromatic trivalent carboxylic acid and an aliphatic monohydric alcohol having 18 to 24 carbon atoms are most preferable.

  The weight ratio (A / B) of the ester compound (A) to the ester compound (B) is 1/1 to 40/1. By using this weight ratio, it is possible to achieve both the stability of yarn production and high base fabric slip resistance (edge comb resistance), and it is possible to obtain desirable characteristics as a synthetic fiber for airbags. When the weight ratio is less than 1/1, friction between the yarn and the drawing roller, that is, metal friction increases, and the roller surface and the single yarn of the synthetic fiber are smoothly slid by high-magnification drawing. Loss of single yarn is likely to occur. On the other hand, when the weight ratio is more than 40/1, the friction of the oil remaining on the airbag base fabric is lowered, and the sliding resistance is lowered. The weight ratio is preferably 2/1 to 15/1, more preferably 2/1 to 10/1, and further preferably 3/1 to 5/1.

  There is no limitation in particular as a manufacturing method of ester compound (A) and ester compound (B), The well-known esterification method is employable.

[Other ingredients]
The synthetic fiber treating agent for an airbag of the present invention includes an ester compound (A) and an ester compound (B) which are essential components, a diester compound (C) of thiodipropionic acid and an aliphatic alcohol, and an aromatic ring. It is preferable to contain at least 1 sort (s) chosen from a silicone compound (D), the below-mentioned nonionic surfactant (E), and the below-mentioned nonionic surfactant (F).

  The diester compound (C) of thiodipropionic acid and an aliphatic alcohol is a component having antioxidant ability. The heat resistance of a processing agent can be improved by using a diester compound (C). You may use 1 type, or 2 or more types. 400-1000 are preferable, as for the molecular weight of the thiodipropionic acid which comprises a diester compound (C), 500-900 are more preferable, and 600-800 are more preferable. The aliphatic alcohol constituting the diester compound (C) may be saturated or unsaturated, and may be linear or branched. 8-24 are preferable, as for carbon number of an aliphatic alcohol, 12-24 are more preferable, and 18-24 are more preferable. Examples of the aliphatic alcohol include octyl alcohol, 2-ethylhexyl alcohol, decyl alcohol, lauryl alcohol, myristyl alcohol, isocetyl alcohol, oleyl alcohol, and isostearyl alcohol. Among these, oleyl alcohol and isostearyl alcohol are exemplified. preferable.

The aromatic ring-containing silicone compound (D) is a component that increases sliding resistance like the ester compound (B), and is more likely to remain on the airbag base fabric than the ester compound (B). By using the aromatic ring-containing silicone compound (D) in combination, the slip resistance can be further increased. The aromatic ring-containing silicone compound (D) is a group having an aromatic ring such as a phenyl group or a naphthalene group at at least one of both ends, one end, side chain, and both side ends of a polysiloxane such as dimethylpolysiloxane. This refers to a modified silicone modified with One or more aromatic ring-containing silicone compounds (D) may be used.
As the aromatic ring-containing silicone compound (D), phenyl-modified dimethylpolysiloxane, diphenylpolysiloxane and the like are used. From both the spinnability and slippage resistance, viscosity (25 ° C.) is preferably 200~600mm ² / s, more preferably from 300 to 500 mm ² / s, more preferably 350~450mm ² / s. The molar ratio (M / P) of the methyl group (M) constituting the polysiloxane chain and the group (P) having an aromatic ring is preferably 10 or less, more preferably 5 or less, further preferably 2 or less, particularly preferably 0. preferable.

  Nonionic surfactant (E) includes polyoxyalkylene aliphatic alcohol ether (E1), polyhydric alcohol partial ester type nonionic surfactant (E2), and polyoxyalkylene polyhydric alcohol fatty acid ester type nonionic surfactant. At least one selected from (E3). The nonionic surfactant (E) is a component that improves the uniform adhesion of the treatment agent to the raw yarn, imparts convergence to the raw yarn, and improves the yarn-making property and weaving property.

The polyoxyalkylene aliphatic alcohol ether (E1) is obtained by adding an alkylene oxide such as propylene oxide or ethylene oxide to an aliphatic monohydric alcohol. It plays a role of giving uniform adhesion to the raw yarn of the treatment agent. In order to improve the uniform adhesion of the essential component ester compound (A), ester compound (B) (including diester compound (C) and aromatic ring-containing silicone compound (D) in some cases) to the raw yarn surface, The group monohydric alcohol preferably has 11 to 15 carbon atoms. Moreover, what has a branched chain is preferable.
Examples of the polyoxyalkylene aliphatic alcohol ether include alkylene oxides of aliphatic alcohols such as octyl alcohol, 2-ethylhexyl alcohol, decyl alcohol, lauryl alcohol, tridecyl alcohol, myristyl alcohol, stearyl alcohol, isostearyl alcohol, and oleyl alcohol. Addenda may be mentioned. Among these, an alkylene oxide adduct of lauryl alcohol and tridecyl alcohol is preferable, and an alkylene oxide adduct of tridecyl alcohol is more preferable.
As addition mole number of alkylene oxide, 2-30 mol is preferable, 4-20 mol is more preferable, and 6-15 mol is further more preferable.

  The polyhydric alcohol partial ester type nonionic surfactant (E2) is a compound obtained by adding an alkylene oxide such as propylene oxide or ethylene oxide to a polyhydric alcohol in a range of 1 mol to less than 50 mol, and a monovalent It is an ester with an aliphatic carboxylic acid (fatty acid). The polyhydric alcohol partial ester type nonionic surfactant (E2) mainly plays a role of increasing the convergence of the raw yarn, but it is preferable that the polyhydric alcohol partial ester type nonionic surfactant does not remain on the base fabric in order to reduce the slip-off resistance, that is, has high scourability. .

Examples of the polyhydric alcohol used in the nonionic surfactant (E2) include glycerin, trimethylolpropane, pentaerythritol, erythritol, diglycerin, sorbitan, sorbitol, ditrimethylolpropane, dipentaerythritol, and sucrose.
The monovalent aliphatic carboxylic acid used for the nonionic surfactant (E2) may be saturated or unsaturated. For example, lauric acid, myristic acid, myristoleic acid, pentadecylic acid, palmitic acid, palmitoleic acid, isocetyl acid, margaric acid, stearic acid, isostearic acid, oleic acid, elaidic acid, vaccenic acid, linoleic acid, linolenic acid, tuberculosic Examples include stearic acid, arachidic acid, isoicosanoic acid, gadoleic acid, eicosenoic acid, behenic acid, isodocosanoic acid, erucic acid, lignoceric acid, isotetradocosanoic acid, and nervonic acid.

Among these, as polyhydric alcohol, glycerin, trimethylolpropane, pentaerythritol, erythritol, sorbitan, and monovalent aliphatic carboxylic acid as palmitic acid, palmitoleic acid, isocetylic acid, margaric acid, stearic acid, isostearic acid Oleic acid, elaidic acid, and vaccenic acid are preferable, and as the polyhydric alcohol, glycerin, sorbitan, and monovalent aliphatic carboxylic acid are more preferably stearic acid, isostearic acid, oleic acid, elaidic acid, and vaccenic acid.
As addition mole number of alkylene oxide, 5-35 are preferable, 10-30 are more preferable, and 15-25 are more preferable.
1000-3000 are preferable, as for the molecular weight of a nonionic surfactant (E2), 1200-2800 are more preferable, and 1500-2500 are more preferable.

  The polyoxyalkylene polyhydric alcohol fatty acid ester type nonionic surfactant (E3) is a compound obtained by adding an alkylene oxide such as propylene oxide or ethylene oxide to an ester of an aliphatic hydroxy monovalent carboxylic acid and a polyhydric alcohol. The polyoxyalkylene polyhydric alcohol fatty acid ester type nonionic surfactant (E3) mainly plays a role of increasing the convergence of the raw yarn, but it is difficult to remain on the base fabric in order to reduce the slip-off resistance, that is, it has a high scouring property. It is preferable.

Examples of the polyhydric alcohol used in the nonionic surfactant (E3) include glycerin, trimethylolpropane, pentaerythritol, erythritol, diglycerin, sorbitan, sorbitol, ditrimethylolpropane, dipentaerythritol, and sucrose.
Examples of the aliphatic hydroxy monovalent carboxylic acid used for the nonionic surfactant (E3) include ricinoleic acid, ricineraidic acid, hydroxystearic acid, cerebuloic acid, and hydroxylignoceric acid.
Among these, as the polyhydric alcohol, glycerin, trimethylolpropane, pentaerythritol, erythritol, sorbitan, and the aliphatic hydroxy monovalent carboxylic acid are preferably ricinoleic acid, ricinaleic acid, and cerebronic acid. As glycerin, sorbitan, and aliphatic hydroxy monovalent carboxylic acid, ricinoleic acid is more preferable.
As addition mole number of alkylene oxide, 1-50 are preferable, 5-35 are more preferable, 10-30 are further more preferable, and 15-25 are especially preferable.
1000-3000 are preferable, as for the molecular weight of a nonionic surfactant (E3), 1200-2800 are more preferable, and 1500-2500 are more preferable.

  The nonionic surfactant (F) reacts a fatty acid having 8 to 24 carbon atoms with a polyhydric alcohol alkylene oxide adduct (F1) and a polyhydric alcohol alkylene oxide adduct (F1) to which 50 mol or more of alkylene oxide is added. It is at least 1 sort (s) chosen from the nonionic surfactant (F2) obtained by these. The nonionic surfactant (F) is a component that imparts convergence to the raw yarn and improves the spinning property and weaving property, while remaining on the airbag base fabric to increase the slip resistance. The slip resistance of the airbag base fabric can be increased more than the nonionic surfactant (E2) and the nonionic surfactant (E3).

  The alkylene oxide adduct (F1) of polyhydric alcohol is obtained by adding 50 mol or more of alkylene oxide such as propylene oxide or ethylene oxide to polyhydric alcohol. Specifically, trimethylolpropane propylene oxide ethylene oxide adduct, pentaerythritol propylene oxide ethylene oxide adduct, ditrimethylolpropane propylene oxide ethylene oxide adduct, dipentaerythritol propylene oxide ethylene oxide adduct, diglycerin propylene oxide ethylene oxide Examples include adducts, sorbitol propylene oxide ethylene oxide adducts, and the like. Among these, trimethylolpropane propylene oxide ethylene oxide adduct is preferable.

As addition mole number of alkylene oxide, 60-200 are preferable, 80-180 are more preferable, and 100-160 are further more preferable.
Moreover, it is preferable that a nonionic surfactant (F) contains 50 mol% or more of propylene oxide with respect to the whole alkylene oxide in a molecule | numerator, 65 mol% or more is more preferable, and 80 mol% or more is further more preferable. When the propylene oxide content is less than 50 mol%, the static friction force between the warp and weft yarns when the finished airbag base fabric is disassembled is reduced, and the fabric slip resistance (edge comb resistance) Is not preferable because it becomes smaller.

  The nonionic surfactant (F2) is obtained by reacting an alkylene oxide adduct (F1) of the polyhydric alcohol with a monovalent carboxylic acid having 8 to 24 carbon atoms. The monovalent carboxylic acid may be either an aliphatic carboxylic acid or an aromatic carboxylic acid. 12-24 are preferable and, as for carbon number of monovalent carboxylic acid, 18-24 are more preferable. The monovalent carboxylic acid having 8 to 24 carbon atoms, which may be saturated or unsaturated, is a saturated alkylbenzene carboxylic acid, dialkylbenzene carboxylic acid, lauric acid, myristic acid, pentadecylic acid, palmitic acid. Acid, isocetyl acid, margaric acid, stearic acid, isostearic acid, tuberculostearic acid, arachidic acid, isoicosanoic acid, behenic acid, isodocosanoic acid, lignoceric acid, isotetradocosanoic acid and the like are preferable. Fatty acids with one unsaturated bond, myristoleic acid, palmitoleic acid, oleic acid, elaidic acid, vaccenic acid, gadoleic acid, eicosenoic acid, erucic acid, nervonic acid can be used in combination with saturated carboxylic acids, but unsaturated Fatty acids having two or more bonds, such as linoleic acid and linolenic acid, are not preferred because degradation proceeds by auto-oxidation.

  The molecular weight of the nonionic surfactant (F) is preferably 3000 to 10,000, more preferably 4000 to 9000, and still more preferably 5000 to 8000. When the molecular weight of the nonionic surfactant (F) is less than 3000, tar-like stains are likely to be generated on the surface of a heated body such as a hot roller when a synthetic fiber is hot stretched at a high magnification, and a lot of smoke is generated. There is a case. When the molecular weight exceeds 10,000, the friction between the yarn and the drawing roller, that is, the friction against metal becomes high, and high-strength synthetic fibers may not be obtained because high-stretching cannot be performed.

[Synthetic fiber treatment agent for airbags]
30 to 80 weight% is preferable, as for the weight ratio of the said ester compound (A) to the non volatile matter of the synthetic fiber processing agent for airbags, 45 to 80 weight% is more preferable, and 60 to 80 weight% is further more preferable. If it is less than 30% by weight, the friction between the yarn and the drawing roller, that is, the friction against the metal becomes high, and high-strength synthetic fibers may not be obtained because high-stretching cannot be performed. If it exceeds 80% by weight, the sliding resistance of the airbag base fabric may be lowered.
2-30 weight% is preferable, as for the weight ratio of the said ester compound (B) to the non volatile matter of a processing agent, 5-20 weight% is more preferable, and 10-20 weight% is further more preferable. If it is less than 2% by weight, the slip resistance of the airbag fabric may be lowered. If it exceeds 30% by weight, the friction between the yarn and the drawing roller, that is, the friction against the metal becomes high, and high-strength synthetic fibers may not be obtained because high-stretching cannot be performed.
The non-volatile content in the present invention refers to an absolutely dry component when the treatment agent is heat treated at 105 ° C. to remove the solvent and the like and reach a constant weight.

  When the treatment agent of the present invention contains the diester compound (C), the weight ratio of the diester compound (C) in the nonvolatile content of the treatment agent is preferably 1 to 20% by weight, more preferably 1 to 15% by weight. 3 to 12% by weight is more preferable. If it exceeds 20% by weight, the occurrence of contamination on the surface of a heating element such as a heat roller may increase.

  When the treatment agent of the present invention contains the aromatic ring-containing silicone compound (D), the weight ratio of the silicone compound (D) in the nonvolatile content of the treatment agent is preferably 1 to 20% by weight, and 5 to 20% by weight. Is more preferable, and 10 to 20% by weight is further preferable. If it exceeds 20% by weight, the residual oil content of the fabric obtained in the weaving process increases, and it may be difficult to coat the elastomer resin on the fabric.

  When the treatment agent of the present invention contains the nonionic surfactant (E), the weight ratio of the nonionic surfactant (E) in the nonvolatile content of the treatment agent is preferably 1 to 40% by weight, 30 weight% is more preferable and 10-20 weight% is further more preferable. If it exceeds 40% by weight, smoke may be generated in the vicinity of a heated body such as a heat roller.

  When the treatment agent of the present invention contains the nonionic surfactant (F), the weight ratio of the nonionic surfactant (F) in the nonvolatile content of the treatment agent is preferably 1 to 20% by weight, 10 weight% is more preferable and 5-10 weight% is further more preferable. If it exceeds 20% by weight, the residual oil content of the fabric obtained in the weaving process increases, and it may be difficult to coat the elastomer resin on the fabric.

  In the treatment agent of the present invention, the total weight of the ester compound (A) and the ester compound (B) in the nonvolatile content of the treatment agent (including the above-mentioned other components) is 90% by weight or more. Preferably there is. By this weight ratio, the yarn-making property of the synthetic fiber and the weaving property of the obtained synthetic fiber can be maintained, and the effects of each component can be sufficiently exhibited.

  In addition, the treatment agent of the present invention is a component other than the above-described components as long as the effects of the present invention are not impaired, such as an antioxidant, a pH adjuster, an antistatic agent, a viscosity stabilizer, and an extreme pressure agent. You may contain a regulator. The weight ratio of these modifiers to the non-volatile content of the treatment agent is preferably less than 10% by weight.

The synthetic fiber treatment agent for airbags of the present invention may be composed of the above-mentioned components consisting only of non-volatile components, or may be prepared by diluting the above non-volatile components with a low-viscosity mineral oil, and emulsifies the non-volatile components in water. It may be a water-based emulsion.
Among these, for the reason of uniform adhesion, those obtained by diluting the aforementioned non-volatile content with a low-viscosity mineral oil and adjusting to an arbitrary viscosity suitable for the oil supply device are preferable. As viscosity (25 degreeC) of the mineral oil to dilute, 1-3 mm < ² > / s is preferable. Further, the concentration of the nonvolatile content when diluted with mineral oil is preferably 30 to 99% by weight.

  About the manufacturing method of the synthetic fiber processing agent for airbags of this invention, there is no limitation in particular and a well-known method is employable. The treating agent is usually produced by adding and mixing the above-mentioned components constituting in any order.

[Synthetic fiber filament for airbags]
The synthetic fiber filament for airbag of the present invention is obtained by adding the synthetic fiber treating agent for airbag of the present invention to the (raw material) synthetic fiber filament. The applied amount of the synthetic fiber treating agent for airbag is preferably 0.01 to 2% by weight, more preferably 0.5 to 1.5% by weight, and more preferably 0.75 to 1 with respect to the (raw material) synthetic fiber filament. More preferred is .25% by weight.
(Raw material) The method for applying the synthetic fiber treating agent for airbag of the present invention to the synthetic fiber filament is not particularly limited, and a known method can be adopted. Usually given in the spinning process or drawing process of synthetic fiber filaments, (raw material) treatment agent consisting only of non-volatile content, synthetic agent diluted with low-viscosity mineral oil, or non-volatile in water Examples thereof include a method of applying a water-based emulsion treatment agent emulsified with a jet nozzle oiling device or a roller oiling device.

  Examples of the (raw material) synthetic fiber filament to which the synthetic fiber treating agent for airbag according to the present invention is applied include synthetic fiber filaments such as polyester, nylon 6, 6, and nylon 6. Among these, nylon 6 and 6 synthetic fiber filaments are particularly suitable because of their durability to the high-pressure gas supplied from the gas generator.

[Base fabric for airbags]
The airbag fabric of the present invention is made by weaving synthetic fiber filaments for airbags to which the synthetic fiber treatment agent for airbags of the present invention is applied. The method for producing the airbag fabric of the present invention includes a weaving step of weaving the synthetic fiber filament for airbag to which the synthetic fiber treatment agent for airbag of the present invention is applied. The weaving process is not particularly limited, and a known process / method can be employed. For example, weaving with a water jet loom, rapier weaving, air jet loom, weaving with a slewer loom and the like can be mentioned.

In the manufacturing method of airbag fabrics woven by rapier weaving, air jet loom, and slewer loom, a scouring process is usually required to remove spinning oil and weaving oil after weaving synthetic fiber filaments for airbag . There is no limitation in particular as a scouring process, A well-known method is employable. For example, it is carried out by impregnating in a hot water bath containing a scouring agent at 20 to 100 ° C., then squeezing with mangle and then drying at 80 to 150 ° C.
In the method for manufacturing an airbag base fabric woven by a water jet loom, most of the treatment agent is removed by water pressure at the time of weaving, so the scouring process is omitted.

  The airbag fabric of the present invention is an airbag fabric woven with the synthetic fiber filament of the airbag of the present invention, and 0.01 to 0 of the ester compound (B) with respect to the entire fabric. .2% by weight is included. Usually, in a woven airbag fabric, the treating agent component is removed by a scouring step or water pressure in a water jet loom. In the airbag fabric of the present invention, the ester compound (A) is selectively removed and the ester compound (B) is selectively left by the scouring step or the water pressure in the water jet loom. The high friction of the ester compound (B) can increase the static frictional force of the yarn and yarn while preventing the yarn from being damaged due to the wear of the yarn and yarn. Become. In addition, when a diester compound (C) is included, these components are also selectively removed.

  EXAMPLES The present invention will be specifically described below with reference to examples, but the present invention is not limited to the examples described herein. In the following examples, “parts” and “%” mean “parts by weight” and “% by weight”.

(Examples 1-11, Comparative Examples 1-12)
The components listed in Table 1 or 2 below were mixed and stirred to prepare the non-volatile content of the synthetic fiber treating agent for airbags of each Example and Comparative Example. Details of each symbol of the treating agent component in Table 1 are as shown in Table 3. These treatment agent non-volatile components and C13 paraffin oil were mixed at a weight ratio of 1: 1 to prepare a synthetic fiber treatment agent for airbags.
Next, after melt spinning 470 decitex, 68 filament round section nylon 6,6 filament, and applying the prepared treating agent to the obtained yarn to 1% by weight by the jet nozzle oiling method. Without being wound, the film was wound by multiple-stage heat stretching at 210 ° C. using a hot roller at a stretch ratio of 5 times to obtain a synthetic fiber filament for an airbag. The stretchability was evaluated by the following method. The results are shown in Tables 4 and 5.

[Extendability during spinning]
After spinning and drawing, the surface of a 10 kg bobbin wound up at 3000 m / min was observed, and the number of fluffs having a length of 1 mm or more was regarded as drawability.
○: Number of fluff 0 or more and less than 10 Δ: Number of fluff 10 or more and less than 20 ×: Number of fluff 20 or more

  Next, the obtained synthetic fiber filaments for each airbag are woven in (a) water jet loom so that the weaving density of warps and wefts is 54 / 2.54 cm, and (b) in a rapier loom. After weaving so that the weaving density of warps and wefts becomes 54 / 2.54 cm, bath bath scouring is performed by a known method, and two types of plain fabrics for air bags (a) and (b) are obtained. Obtained. For these air bag base fabrics, the following evaluation methods were used to determine the static frictional force between yarns, the residual oil content of the base fabric, the residual amount of ester compound (B), the base fabric breaking strength, the base fabric slip resistance (edge comb). Resistance) was evaluated. The results of the airbag fabric (a) are shown in Tables 4 and 5, and the results of the airbag fabric (b) are shown in Tables 6 and 7.

[Thread-to-thread static friction force]
The static friction force between yarns is disassembled from the airbag base fabric and the yarns (warp and weft) are taken out. Using the measuring device as shown in Fig. 1, the yarn is pulled three times under the load T1 (g). The tension T2 (g) when pulled at a speed of 3 cm / min was measured, and the ratio of T2 / T1 was defined as the yarn-to-thread static friction force. The larger the T2 / T1 value, the higher the yarn-to-thread static friction force, and the lower the value, the lower the yarn-to-thread static friction force. In order to achieve both sliding resistance and breaking strength of the airbag base fabric, T2 / T1 is preferably 2.75 to 3.50.

[Residual oil content of base fabric]
About 300 g of a base fabric sample was collected, and the mass (S) after being left in a hot air dryer at 105 ° C. for 90 minutes was measured with an electronic balance and placed in a large Soxhlet extractor. Next, about 2 liters of cyclohexane was added and heated to reflux for about 4 hours, then cyclohexane was recovered, the absolute dry weight (M) of the extract was measured, and the residual oil content was determined from the following formula. Residual oil content (%) = M ÷ S × 100

[Residual amount of ester compound (B)]
The extracted residual oil is dissolved in a solvent (mixed solution of 90 parts by weight of chloroform and 10 parts by weight of diethyl ether), and after passing through silica gel column chromatography, the solvent is recovered and the ester compound (A) and the ester compound ( The weight (X) of the mixture of B) (including a diester compound (C) of thiodipropionic acid and an aliphatic alcohol and an aromatic ring-containing silicone compound (D), if included) was obtained. Next, the content (Y;% by weight) of the ester compound (B) contained in this mixture (or the sum of those containing an aromatic ring-containing silicone compound (D)) is determined by gas chromatography / mass spectrometry. Then, the residual amount (%) of the ester compound (B) (or the sum when the aromatic ring-containing silicone compound (D) is included) was determined from the following formula.
Residual amount of ester compound (B) (%) = X × Y ÷ S

[Base fabric breaking strength]
Test method: Based on JIS L1096, the breaking strength was measured when the fabric width was 3 cm, the distance between grips was 15 cm, and the tensile speed was 200 mm / min.
A: The measured value is 2250 (N) or more. ○: The measured value is 2000 (N) or more. Δ: The measured value is 1500 (N) or more and less than 2000 (N). X: The measured value is less than 1500 (N).

[Base fabric slip resistance (edge comb resistance)]
Test method: Based on ASTM D6479, a test piece having a width of 5 cm and a length of 30 cm was cut out from a base fabric for an airbag, and the sliding resistance of warp and weft was measured when pulled at a pulling speed of 200 mm / min. . The greater the resistance to slipping off the base fabric, the better the airtightness when the airbag is made.
◎: Measurement value is 450 (N) or more ○: Measurement value is 400 (N) or more △: Measurement value is 300 (N) or more and less than 400 (N) ×: Measurement value is less than 300 (N)

As can be seen from Tables 4 and 5, the synthetic fiber filaments to which the synthetic fiber treatment agents for airbags of Examples 1 to 11 were applied have good stretchability during yarn production. Further, as can be seen from Tables 4 to 7, the airbag fabrics of Examples 1 to 11 are excellent in both the water jet loom weaving (a) and the rapier weaving weaving (b), and the frictional force between the yarns and the yarns is excellent. Both fabric breaking strength and base fabric slip resistance are excellent. Therefore, it was possible to achieve both the base fabric breaking strength and the base fabric slip resistance.
On the other hand, Comparative Examples 1-12 (the processing agent which does not contain an ester compound (A) and an ester compound (B) essential, and the weight ratio (A / B) of an ester compound (A) and an ester compound (B) is 1. In the case of using a treatment agent that does not satisfy 1 to 40/1), the stretchability at the time of yarn production is inferior to that of the examples, and the static frictional force between the yarn and the yarn is low, and the base fabric breaking strength and the base are low. Both cloth slipping resistance is inferior.

  The synthetic fiber treatment agent of the present invention is excellent in extreme pressure properties, lubricity, and heat resistance, and is applied in the fiber manufacturing process and / or processing step. Especially, it is a synthetic material for industrial materials with high strength such as nylon and polyester. Suitable for fiber.

Claims (10)

An ester compound having at least one polyvalent ester selected from an ester of an aliphatic polyhydric alcohol and a fatty acid and an ester of an aliphatic monohydric alcohol and an aliphatic polyvalent carboxylic acid, and having a molecular weight of 200 to 1300 ( A) and
An ester compound (B) having at least one aromatic ring selected from an ester of an aromatic carboxylic acid and an alcohol and an ester of an aromatic alcohol and a carboxylic acid and having a molecular weight of 200 to 2600 is essential. Contained in
The synthetic fiber processing agent for airbags whose weight ratio (A / B) of the said ester compound (A) and the said ester compound (B) is 1 / 1-40 / 1.   The processing agent according to claim 1, wherein the ester compound (A) is a compound having an unsaturated bond.   The processing agent of Claim 1 or 2 whose said ester compound (A) is a compound which has a 3 or more ester group in a molecule | numerator.   The processing agent according to any one of claims 1 to 3, wherein the ester compound (A) is an ester of a trihydric or higher aliphatic polyhydric alcohol and an unsaturated fatty acid having 8 to 24 carbon atoms.   The processing agent in any one of Claims 1-4 whose said ester compound (B) is a compound which has a 2 or more ester group in a molecule | numerator.   The processing agent according to any one of claims 1 to 5, wherein the ester compound (B) is an ester of an aromatic carboxylic acid and an aliphatic alcohol having 8 to 24 carbon atoms.   The weight ratio of the ester compound (A) in the non-volatile content of the treating agent is 30 to 80% by weight, and the weight ratio of the ester compound (B) is 2 to 30% by weight. The processing agent in any one.   The synthetic fiber filament for airbags to which the processing agent in any one of Claims 1-7 was provided with respect to the synthetic fiber filament.   The synthetic fiber filament for an airbag according to claim 8, wherein the synthetic fiber filament is a synthetic fiber filament of nylon 6, 6, nylon 6, or polyester.   A base fabric for an air bag in which the synthetic fiber filament according to claim 8 or 9 is woven.

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