JP2852887B2 - Oil agent for elastic fiber - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an oil agent for elastic fibers, and more particularly, to a fiber having a specific silicone resin, which has a low sticking property between fibers, has an excellent unwinding balance between an inner layer and an outer layer of cheese, and has a yarn running property. The present invention relates to an oil agent for obtaining a polyurethane elastic fiber with less generation of sediment (scum) on a guide or the like in the inside.

[0002]

2. Description of the Related Art Conventionally, polyurethane elastic fibers have a problem of poor unwinding property in a post-processing step because of the large adhesiveness between the fibers.

[0003] As a method of preventing the sticking, a method of applying solid fine particles such as talc, silica, colloidal alumina or the like to the fiber as an aqueous or oily slurry, a method of dispersing a metal salt powder of a higher fatty acid in water or mineral oil ( (Japanese Patent Publication No. 41-286) and amino-modified silicon obtained by adding an amino group to the branched chain of polydimethylsiloxane (Japanese Patent Publication No. 63-8233).
A method has been proposed in which a base having a reactive functional group (for example, Japanese Patent Application Laid-Open Publication No. 2000-252) is mixed with mineral oil or dimethylpolysiloxane to deactivate active isocyanate groups on the yarn surface to prevent self-adhesion between fibers. ing.

[0004] However, in the former method, solid particles are used, so that it is difficult to uniformly adhere the yarn to the yarn, and a large amount of scum is found on the yarn path, which is a problem in operation. In the latter case, there is a problem that the fibers themselves are too soft, so that the twill falls on the cheese and the twill breaks. As a method for solving this problem, a method using a silicone resin in combination (Japanese Patent Laid-Open No. 03-51374).
Has been suggested. However, usually, the silicone resin used for this application is a silicone resin containing a siloxane unit (D unit) represented by the general formula (3) and a siloxane unit (T unit) represented by the general formula (4) as main components. It is a resin (DT resin). This DT resin has insufficient anti-sticking properties. Even when used for the purpose of preventing twill drop and twill break on cheese, it must be added in an amount exceeding 5%. The effect is not recognized, and since the amount is large, there is a problem that the viscosity of the entire oil agent increases.

[0005]

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(R2 represents a methyl group or a phenyl group)

[0007]

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(R2 represents a methyl group or a phenyl group)

[0009]

Accordingly, it is an object of the present invention to prevent the fibers from sticking together while keeping the viscosity of the oil agent within an appropriate range, to have a good unwinding balance between the inner layer and the outer layer of the cheese, and to improve the cheese. It is an object of the present invention to provide an oil agent for polyurethane elastic fibers that prevents traversing and traversing, generates less scum in spinning and post-processing steps, and provides good operability.

[0010]

Means for Solving the Problems The present inventors can prevent the fibers from sticking together, prevent the traversing of the cheese, and prevent the traversing of the cheese, and can obtain good operability with less scum in the post-processing step from spinning. As a result of intensive studies to obtain a fiber oil agent,
Specific silicone resin (MQ resin) in spinning process
It has been found that the above-mentioned problems can be solved by attaching an oil agent containing to the fibers, and the present invention has been achieved.

That is, the present invention provides a silicone resin (MQ resin) containing a siloxane unit (M unit) represented by the general formula (1) and a siloxane unit (Q unit) represented by the general formula (2) as main components. An oil agent for an elastic fiber, wherein the ratio of M unit / Q unit of the silicone resin is 0.4 to 1.5.

[0012]

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In the formula, R1 represents an alkyl group having 1 to 10 carbon atoms or an aryl group.

[0014]

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In the general formula (1), R1 represents a linear or branched alkyl group having 1 to 10 carbon atoms (methyl, ethyl, propyl, butyl, pentyl, hexyl, heptyl, octyl, octyl) Group, nonyl group, decyl group, isopropyl group, isobutyl group, 2-ethylhexyl group, etc.) and aryl group (phenyl group, tolyl group, xylyl group, biphenyl group, naphthyl group, anthryl group,
Phenanthryl group, etc.). Among these groups represented by R1, preferred are a linear or branched alkyl group having 1 to 5 carbon atoms and a phenyl group.

In order for the silicone resin (MQ resin) of the present invention to exhibit excellent anti-sticking properties, the ratio of M unit / Q unit, which is the main constituent, is usually 0.4 to 1.5.
Is used. More preferably, 0.5 to 1.3.
It is. When the ratio of M unit / Q unit is less than 0.4, the degree of crosslinking in the molecule becomes too large, and the base oil (mineral oil,
Compatibility with dimethylpolysiloxane, etc.), resulting in problems such as uneven adhesion to the yarn and scum during the process. On the other hand, when the ratio of M unit / Q unit exceeds 1.5, the degree of crosslinking in the molecule becomes low, and it may be difficult to exhibit a sufficient anti-sticking function.

The content of the silicone resin (MQ resin) of the present invention is usually 0.1 to 10 with respect to the total amount of the oil.
%, More preferably 0.5 to 5% by weight. When the content is less than 0.1% by weight, the anti-sticking property is insufficient, and when it exceeds 10% by weight, the viscosity of the entire oil agent tends to increase. Problems such as cutting may occur.

The silicone resin (MQ) used in the present invention
Resin) can be produced by a method in which water glass is used as a starting material for the Q unit and the terminal is blocked with a trialkylsilyl group (M unit).

The viscosity of the oil agent containing the silicone resin (MQ resin) of the present invention is preferably 100 cst or less at 25 ° C. in order to prevent uniform adhesion and prevention of roller wrapping.

As the base oil of the oil agent containing the silicone resin (MQ resin) of the present invention, mineral oil and / or diorgano oil is usually used in order to reduce friction with various rollers or guides in the spinning and post-processing steps. The use of polysiloxanes is preferred.

As the mineral oil used in the oil agent of the present invention, any mineral oil may be selected as long as the viscosity of the whole blended oil is 100 cst or less at 25 ° C., but usually the viscosity at 25 ° C. is 3 to 50 cst. Is preferred. Viscosity is 3c
If it is less than st, volatility tends to be high, and adhesion to yarn tends to be difficult. If it exceeds 50 cst, it may be difficult to control the viscosity of the entire blended oil.

Examples of the diorganopolysiloxane used in the oil agent of the present invention include dimethylpolysiloxane and those obtained by substituting some of the methyl groups of dimethylpolysiloxane with other alkyl groups and phenyl groups. In any case, any one may be selected as long as the viscosity of the blended oil is not more than 100 cst at 25 ° C.
Is preferably 3 to 50 cst. If the viscosity is less than 3 cst, the volatility is high and adhesion to the yarn may be difficult, and if it exceeds 50 cst, it may be difficult to control the viscosity of the entire blended oil.

The oil agent for elastic fibers of the present invention may further contain an anti-sticking component, for example, mineral solid fine particles such as talc, silica and colloidal alumina, or metal powder salts of higher fatty acids, or room temperature such as paraffin and polyethylene. Modified silicones such as solid wax, polyether-modified silicone, amino-modified silicone, epoxy-modified silicone, silicone resin (DT resin), and silicone resins (MQ resins) of the present invention such as alcohols and fatty acid esters as binders May be added to such an extent that the performance of the above is not impaired, and the addition can increase the anti-sticking effect. Further, components commonly used in spinning oils, such as antistatic agents, antioxidants, and ultraviolet absorbers, can be added.

The oil agent for elastic fiber of the present invention can be applied to the yarn by roller oiling or nozzle oiling at an arbitrary position after spinning and before winding the yarn in the polyurethane fiber spinning process. The oil agent of the present invention is usually 0.5 to 10% by weight, preferably 1 to 10% by weight based on the polyurethane elastic fiber.
8% by weight is applied.

[0025]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in more detail by way of examples, but the present invention is not limited thereto.

The appearance of the oils obtained in the examples and comparative examples, and the test methods for scum generation and stickiness of the yarns provided with the oils are as follows. (A) Appearance of oil The appearance of the adjusted oil was visually judged. -Evaluation Criteria- ○: Transparent liquid ×: Turbidity (b) Scum generation In melt spinning of polyurethane fibers, the adjusted oil agent is supplied to the roller by roller lubrication, and the oil agent adhesion amount is 6% based on the filament weight.
And wound around cheese at 300 m / min to obtain a 40d polyurethane fiber. 24 hours after the start of spinning, the presence or absence of scum on the yarn path was visually determined. -Evaluation criteria- ○: No occurrence △: Occurrence ×: Occurrence many
The unwinding tension in the inner layer and the outer layer of the cheese was measured. The smaller the unwinding tension, the smaller the adhesiveness between the yarns.

[0027]

EXAMPLE An oil agent was blended with the composition shown in Table 1, and the total amount was 10
By adjusting to 0 parts, the oil agent for elastic fibers of the present invention was adjusted.
Table 1 also shows the evaluation results of the appearance of the oil agent, scum, and stickiness.

The following modified silicon was used in Table 1.

Silicon resin (DT resin): BY16
-877 (manufactured by Dow Corning Toray) Amino-modified silicon: KF-861 (manufactured by Shin-Etsu Chemical Co., Ltd.) Polyether-modified silicon: KF-351 (manufactured by Shin-Etsu Chemical Co., Ltd.) Epoxy-modified silicon: SF-8413 (manufactured by Toray Industries, Inc.) Dow Corning Corporation)

[0030]

[Table 1]

As apparent from Table 1, the oil agent containing the silicone resin (MQ resin) of the present invention has a small difference in unwinding tension between the inner layer and the outer layer of the cheese, and the unwinding balance between the inner layer and the outer layer. Is found to be good.

Further, in Examples 1 to 6 of the present invention, it can be seen that the occurrence of scum is remarkably reduced also with respect to scum.

[0033]

Conventionally, when a polyurethane fiber is produced, if it is treated with an oil agent containing an agent for preventing sticking between yarns, scum is generated in a post-processing step from spinning, and stable operability is obtained. Could not. But,
In the case of using an oil agent for elastic fibers containing the silicone resin (MQ resin) of the present invention, scum is less generated on the yarn path, and anti-sticking property of the yarns, especially in the inner layer-outer layer of cheese. Because the unwinding balance is excellent,
Polyurethane elastic fibers can be produced from spinning in a post-processing step while maintaining stable operability.

Continuation of front page (58) Field surveyed (Int.Cl. ⁶ , DB name) D06M 15/00-15/72

Claims (2)

(57) [Claims] 1. A silicone resin (MQ) comprising a siloxane unit (M unit) represented by the general formula (1) and a siloxane unit (Q unit) represented by the general formula (2) as main components.
Resin), wherein the ratio of M unit / Q unit of the silicone resin is 0.4 to 1.5. (R1) 3-Si-O- (1) (R1 represents an alkyl group or an aryl group having 1 to 10 carbon atoms) 2. The oil agent for elastic fibers according to claim 1, wherein the content of said silicone resin is 0.1 to 10% by weight based on the whole oil agent.