JP2943241B2 - Synthetic fiber treatment agent - Google Patents

Description

Description: FIELD OF THE INVENTION The present invention relates to a treating agent for synthetic fibers, and more particularly to a treating agent for synthetic fibers comprising a leveling agent and a nonionic activator. The present invention relates to a synthetic fiber treating agent which is excellent in stretchability and heat resistance when subjected to thermal stretching and / or heat treatment after application of the treating agent to the resin, and does not impair heat resistance even after heating.

[Prior Art] Conventionally, a compounding agent containing a nonionic activator and a leveling agent in a synthetic fiber treating agent is disclosed in, for example, JP-A-54-147214.

JP-A-54-147214 discloses (A)
A diester of thiodipropionic acid and a monohydric alcohol having 12 to 18 carbon atoms, and (B) an ethylene oxide adduct of castor oil having 10 to 15 moles of ethynylene oxide added or a hydrogenated castor oil as a nonionic surfactant. Contains
It is described that the compounding weight ratio of (A) and (B) is 4: 1 to 2: 3.

[Problems to be Solved by the Invention] In the case of the above-mentioned hardened castor oil EO adduct, higher alcohol EO adduct, higher alcohol EOPO adduct, when applied to synthetic fibers and then subjected to hot drawing and / or heat treatment, many Smoke is generated and the environment of the hot drawing process and heat treatment process is deteriorated.Ventilation facilities for this environmental protection are enormous, and the running cost of ventilation is enormous. Had poor heat resistance and low stretchability.

An object of the present invention is to provide a synthetic fiber treating agent capable of solving the above-mentioned problems in the prior art, and is caused by the treating agent when subjected to hot drawing and / or heat treatment after applying the treating agent to the synthetic fiber. An object of the present invention is to provide a treating agent for synthetic fibers that can eliminate smoke and maintain heat resistance even after heat treatment and improve stretchability.

[Means for Solving the Problems] The synthetic fiber treating agent of the present invention comprises: A. 75 to 90% by weight of a diester compound of thiodipropionic acid and a monohydric alcohol having 12 to 18 carbon atoms; .25 to 10% by weight of a non-ionic activator obtained by reacting a compound obtained by adding 10 to 50 mol of ethylene oxide to a polyhydric alcohol with a monocarboxylic acid and a dicarboxylic acid; .

The component A, which is a leveling agent, is a diester compound of thiodipropionic acid and a monohydric alcohol having 12 to 18 carbon atoms.In the case of a diester using a monohydric alcohol having less than 12 carbon atoms, it is added to synthetic fibers. When the synthetic fiber is subjected to hot drawing and / or heat treatment after the heat treatment, a large amount of smoke is generated, which is inappropriate for operation. In the case of a diester using a monohydric alcohol having more than 18 carbon atoms, the surface tension is high and the spreadability is not sufficient, so that the spread on the fiber after being applied to the synthetic fiber is insufficient and spots are formed. There are many yarn breaks in the process of drawing the synthetic fiber, which is unsuitable in terms of quality and operability. Furthermore, the heating element tends to become dirty when subjected to heat stretching and / or heat treatment, and much time and labor is required for cleaning the heating element, resulting in poor productivity.

The component B, which is a nonionic activator, is a compound obtained by reacting a compound in which 10 to 50 mol of ethylene oxide is added to a polyhydric alcohol, with monocarboxylic acid and dicarboxylic acid. As the ethylene oxide adduct of the polyhydric alcohol, for example, any compound may be used as long as it is a hydrogenated castor oil ethylene oxide adduct, a castor oil ethylene oxide adduct, a sorbitol ethylene oxide adduct, a trimethylolpropane ethylene oxide adduct. But preferably an ethylene oxide adduct of hydrogenated castor oil.

Here, the number of moles of ethylene oxide added is preferably 25 to 40 moles, and the use of a compound having the number of moles of ethylene oxide less than 10 moles not only makes it difficult to improve the smoke-generating property, but also makes the heating element dirty. And the yarn breakage of the drawn yarn frequently occurs.

On the other hand, when a compound having an ethylene oxide addition mole number of more than 50 moles is used, the surface tension and the contact angle are high, the spreadability of the stretching roller is not improved, and the friction at the time of yarn production is increased.

Examples of the monocarboxylic acid used in the nonionic surfactant include caproic acid, caprylic acid, lauric acid, palmitic acid, stearin, oleic acid, and isostearic acid, and preferably stearic acid and oleic acid are used. . Examples of the dicarboxylic acid include maleic acid, adipic acid, sebacic acid, dodecanoic acid and brassic acid, and preferably maleic acid and adipic acid.

The treating agent for synthetic fibers according to the present invention, the total of the diester compound of the component A and the nonionic activator of the component B is 100
In terms of% by weight, the content of the diester compound is usually 75 to 90% by weight, preferably 80 to 85% by weight.

If the content of the diester compound is less than 75% by weight, the spreadability, heat resistance, and smoothness of the stretching roller as a whole may be insufficient, and if the content is more than 90% by weight, the quality of the processing agent may be reduced. It is not preferable because the stability is deteriorated.

On the other hand, the content of nonionic activator is 10-25% by weight,
When the content of the nonionic activator is less than 10% by weight, the quality stability of the treating agent may be deteriorated. When the content is more than 25% by weight, the spreading property of the stretching roller, heat resistance, The smoothness may be insufficient, which is not preferable.

The diester compound of the component A of the present invention can be obtained, for example, by reacting thiodipropionic acid with a predetermined alcohol.

Nonionic surfactants include, for example, adding adipic acid and oleic acid to hydrogenated castor oil ethylene oxide adduct,
It is obtained by performing a dehydration reaction at 0 to 160 ° C.

As a method for applying the synthetic fiber treating agent according to the present invention to a fiber, a non-water-containing treating agent or an emulsion treating agent emulsified with water is used, and is applied in a spinning step or a step before and after stretching using a roller or a guide. You.

The synthetic fiber to which the synthetic fiber treating agent according to the present invention is applied has excellent spreadability on a drawing roller when drawing using a drawing roller, and the fiber property of the fiber is significantly improved.

The following method evaluated the synthetic fiber treating agent in the following Examples.

Smoke emission property: The smoke emission state of a hot roller and a hot plate during stretching was visually observed.

：: No smoke generated ○: Little smoke was generated ×: Many smoke was generated Dirt: The state of dirt on the hot roller and hot plate during stretching was visually observed.

：: No dirt ○: Almost no dirt ×: Lots of dirt Stretchability: It is indicated by the number of yarn breakage during drawing that occurred during drawing of 1 ton of 6 nylon filaments by weight of polymer.

 Smoothness test: The coefficient of friction between the yarn and the metal was evaluated.

Treatment agent stability: After blending the treatment agent at 50 ° C, the stability after standing at 25 ° C for 3 days was evaluated.

 ◎: Excellent translucency and excellent condition while maintaining the compounded state.

：: Light transmittance was slightly inferior to ◎, but good, with no change in separation or other properties observed.

X: The translucency was poor, and the leveling agent and the nonionic surfactant were separated.

 Surface tension: measured at 25 ° C. by the Deny method.

Contact angle: Measured with a contact angle meter. The contact angle with a 6 nylon film was measured at 25 ° C.

[Examples 1 and 2 and Comparative Examples 1 to 4] When a nylon 6 filament yarn of 1260 denier and 204 filaments is produced by a usual method, a treatment agent having a composition shown in Table 1 is applied to a melt-spun yarn. After applying 1% by weight to the fiber by the lubrication method, 20
Using a hot roller and a hot plate heated to 0 ° C., the film is stretched at a stretch ratio of 5 times.
The fuming property on the hot plate, the hot roller, the stained state of the hot plate, and the stretchability (number of yarn breaks during stretching) were measured.

The results shown in Table 2 were obtained by the above measurement.

As is clear from Table 2, Examples 1 and 2 using the treating agent according to the present invention have an effect that the stretchability is remarkably improved as compared with Comparative Examples 1 to 4.

[Examples 3 and 4 and Comparative Rows 5 to 8] When a nylon 6 filament yarn of 1260 denier and 204 filaments is produced by a usual method, a treatment agent having a composition shown in Table 3 is applied to a melt-spun yarn. After applying 1% by weight to the fiber by the lubrication method, 20
The film was heated to 0 and stretched at a stretch ratio of 5 using a hot roller and a hot plate. Oil adhesion to fiber
1.0%. The hot roller during hot drawing and the hot plate, the smoke generation property, the contamination state of the hot roller and the hot plate, and the drawability (number of yarn breaks during drawing) were measured.

The above measurements yielded the results shown in Table-4.

In Examples 3 and 4 using the treating agent according to the present invention, the stretchability was excellent and the dirt on the hot roller was small as compared with Comparative Example 5.

 In addition, the stretchability and the smoke emission are superior to Comparative Example 6.

Further, Examples 3 and 4 using the treating agent according to the present invention,
Compared with Comparative Example 7, it is excellent in centering property and heat resistance.

Furthermore, Examples 3 and 4 using the treating agent according to the present invention
Is excellent in stretchability and smoothness as compared with Comparative Example 8.

[Examples 5 and 6 and Comparative Examples 9 to 12] A nylon 6 filament yarn of 1260 denier and 204 filaments was melt-spun by an ordinary method, and a treatment agent having a composition shown in Table 5 was supplied to the obtained yarn with a roller. After giving 1% by weight to the fiber by the method, it was stretched at a draw ratio of 5 times using a hot roller and a hot plate heated to 200 ° C. without winding.

The amount of the oil agent attached to the fibers was 1.0%. The hot roller at the time of stretching, the smoke generating property at the hot plate, the hot roller and the hot rate, and the stretchability (the number of yarn breakage at the time of stretching) were measured.

 The results shown in Table 6 were obtained by the above measurement.

Examples 5 and 6 using the treating agent according to the present invention have better stretchability and heat resistance than Comparative Example 9, and have better stretchability and heat resistance than Comparative Example 10.

Further, Examples 5 and 6 using the treating agent according to the present invention are superior in treating agent stability as compared with Comparative Example 11, and are superior in stretchability and smoothness as compared with Comparative Example 12.

[Effect of the Invention] The synthetic fiber treating agent according to the present invention is excellent in stability, heat resistance during production (smoke emission, hot roller, hot plate stain) and smoothness, and is excellent in the stretching process of the synthetic fiber. Has the effect of reducing thread breakage.

In particular, by applying the treating agent of the present invention, the surface tension, the contact angle is reduced, the spreadability of the synthetic fiber on the drawing roller is improved, and the variation of each single yarn forming the synthetic fiber is eliminated, While significantly improving stretchability, high quality,
High quality synthetic fibers can be obtained.

Claims (1)

(57) [Claims] A. 75 to 90% by weight of a diester compound of A. thiodipropionic acid and a monohydric alcohol having 12 to 18 carbon atoms,
And B. 25 to 10% by weight of a nonionic activator obtained by reacting a compound in which 10 to 50 mol of ethylene oxide is added to a polyhydric alcohol with a monocarboxylic acid and a dicarboxylic acid, Characteristic treatment agent for synthetic fibers.