JPH11323729A - Polyamide yarn having small fineness and large strength and its production - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain the subject yarn having good strengths and a good touch and useful for sports wears, clothes, etc., by melt-spinning a polyamide resin, subjecting the spun yarn to interlacing treatments and oiling treatments before and after a drawing treatment, and subsequently winding up the treated yarn. SOLUTION: This polyamide yarn having a total fineness of <=35 denier, a strength of >=6.0 g/denier and an interlacing number of >=35 interlaced points/ m is obtained by melt-spinning a polyamide resin from a spinneret 1, cooling the spun filaments, imparting a non-aqueous oiling agent to the cooled filaments and simultaneously bundling the filaments in a slit nozzle 2, simultaneously treating the obtained yarn with a fluid in an interlacer 3 to subject the yarn to the first interlacing treatment, drawing the yarn between rollers 4, 5, subjecting the yarn to the second interlacing treatment in an interlacer 6, imparting an oiling agent containing a dioctylsulfosuccinate salt and a polyoxyethylene alkyl ether and/or a polyoxyethylene alkylphenyl ether as an after oil having a high sizing agent-conjugating property in a slit nozzle 7, and subsequently winding up the treated yarn on a package 9 with a winder 8.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fine and high-strength polyamide fiber capable of obtaining a high-density woven fabric excellent in strength and texture, particularly suitable for sports use and general clothing use, and a method for producing the same. It is.

[0002]

2. Description of the Related Art In recent years, thin and high-strength woven fabrics have been required for sports and outdoor applications. In order to satisfy this requirement, the total fineness is 35 denier (d) or less, and the number of filaments is 30 or less.
High-strength fibers having a strength of 0 g / d or more have been developed.

[0003] In the production of such a fiber, a non-aqueous oil agent is provided since an emulsion oil agent does not have properties such as sufficiently high elongation at the time of production. However, if a non-aqueous oil agent is applied, if this fiber is used for warp during weaving, the sizing agent to be attached to the fiber will not easily penetrate into the fiber (poor binding of the sizing agent), and during weaving. There is a problem in that the paste is degreased and eventually the yarn is opened, so that the weaving property is deteriorated and the quality of the obtained woven fabric is deteriorated.

In order to solve this problem, a general method is considered in which the number of entangled yarns is increased to improve the entanglement with the sizing agent and to suppress fiber opening. However, in the direct spinning and drawing method, if the air pressure of the fluid treatment in the interlacer is too high in order to increase the number of entanglements, there is a problem that fluff is likely to be generated on the yarn. Also,
If the confounding is applied again after winding the yarn once to increase the number of confounds, it is possible to impart a sufficient number of confounds to the yarn, but it takes time and costs. was there.

[0005]

DISCLOSURE OF THE INVENTION The present invention solves the above-mentioned problems and provides a high-density woven fabric which is fine and high in strength, and which can obtain a high-quality high-density woven fabric without falling off during weaving. An object of the present invention is to provide a high-strength polyamide fiber and a production method for producing the fiber efficiently by a direct spinning and drawing method without problems such as fluff.

[0006]

Means for Solving the Problems The present inventors have made intensive studies to solve the above problems, and as a result, have reached the present invention. That is, the present invention provides the following (1) and (2). (1) Total fineness of 35 denier or less, strength of 6.0 g / denier or more, entanglement number of 35 / m or more, containing dioctyl sulfosuccinate salt and polyoxyethylene alkyl ether and / or polyoxyethylene alkyl phenyl ether And a high-strength polyamide fiber having a fine fineness. (2) A method of producing by a direct spin drawing method in which a polyamide resin is melt-spun and the spun yarn is cooled, then drawn between rollers, and wound at a speed of 3000 m / min or more, before and after drawing. The yarn is subjected to fluid treatment with an interlacer to impart entanglement, and a non-hydraulic agent is applied before stretching, and after stretching, as an after oil, dioctyl sulfosuccinate salt, polyoxyethylene alkyl ether and / or polyoxyethylene alkyl ether. The method for producing a polyamide fiber having high fineness and fineness according to (1), wherein an oil agent containing oxyethylene alkylphenyl ether is provided.

[0007] The strength and elongation of the fiber in the present invention was measured using an autograph AGS-50D manufactured by Shimadzu Corporation and the sample length was measured.
The measurement was performed at 25 cm and a pulling speed of 25 cm / min. The number of entanglements was measured by the method described in JIS-L-1013 713 to calculate the number of entanglements per 1 m of yarn.

[0008]

Next, the present invention will be described in detail. The polyamide fiber of the present invention is nylon 6, nylon 11, nylon 12, nylon 46, nylon 66,
Examples thereof include nylon 610 and the like, but the present invention is not limited thereto. Two or more of these may be copolymerized or mixed. As long as the properties of the polyamide fiber of the present invention are not impaired, the polyamide fiber may contain various additives (such as a matting agent, a coloring agent, a stabilizer, and an antistatic agent).

When the polyamide fiber of the present invention is woven,
A high-density and high-strength woven fabric can be obtained, and it is necessary that the total fineness is 35 d or less and the strength is 6.0 g / d or more. If the fineness exceeds 35d, a woven fabric having a high density and good texture cannot be obtained, and if the strength is less than 6.0 g / d, the strength of the woven fabric is insufficient.

Further, the fiber of the present invention is provided with an oil containing a dioctyl sulfosuccinate salt and a polyoxyethylene alkyl ether and / or a polyoxyethylene alkyl phenyl ether, ie, one of the following three oils. Have been.・ Oil containing dioctyl sulfosuccinate and polyoxyethylene alkyl ether ・ Oil containing dioctyl sulfosuccinate and polyoxyethylene alkyl phenyl ether ・ Dioctyl sulfosuccinate and polyoxyethylene alkyl ether and polyoxyethylene alkyl Oils Containing Phenyl Ether These components have excellent compatibility with the sizing agent and have an effect of improving the permeability of the sizing agent. By providing such an oil agent containing these components as described above, the sizing agent easily penetrates into the inside of the yarn, and the sizing agent does not easily fall off during weaving.

[0011] Therefore, if these components are not contained, the sizing agent will only cover the surface during the manufacturing process, and the sizing agent will peel off with a slight impact during weaving.

The amount of the oil agent excellent in conjugation with the sizing agent is preferably 0.05 to 1.0% by weight of the whole fiber. If it is less than 0.05% by weight, the effect of improving the permeability of the paste tends to be insufficient, and if it exceeds 1.0% by weight, there is a possibility that problems such as looseness and dirt of the package during winding will occur. Get higher.

Further, the fibers of the present invention are entangled at a rate of 35 entangles / m or more in order to improve the entanglement with the sizing agent to be applied during the production and to prevent the sizing from occurring during weaving. When the number of entanglements is less than 35 / m, the entanglement of the glue becomes insufficient,
Paste occurs. The number of entanglements of the fiber of the present invention is more preferably 40 fibers / m or more, but the number of entanglements of the fiber of the present invention is reduced because an oil agent excellent in conjugation with the sizing agent as described above is provided. Since the amount of glue can be prevented without increasing the number, the number of entanglements should be about 50 / m.

Next, a method for producing the polyamide fiber of the present invention will be described. The production method of the present invention is a method of producing by a direct spin drawing method in which a polyamide resin is melt-spun, a spun yarn is cooled and solidified, drawn between rollers, and wound at a speed of 3000 m / min or more, Before and after the stretching between the rollers, the interlacing and the oil agent are applied by the interlacer.

In the present invention, it is necessary to perform fluid treatment in two stages before and after stretching between rollers. That is,
When applying confounding in the direct spinning and drawing method, in order to improve conjugation with the sizing agent over time, when increasing the number of confounds, fluid treatment with high-pressure air with an interlacer only after stretching is performed to impart confounding In addition, fluff is generated on the yarn. Therefore, in the present invention, the generation of fluff can be suppressed by performing the fluid treatment in two stages and applying the oil agent in two stages.

The air pressure of the interlacer at the time of performing the fluid treatment is preferably about 3.0 to 6.0 kg / cm ^{2, and} is preferably slightly higher after stretching than before stretching.

Further, in the present invention, the oil agent is applied before and after the stretching, and the oil agent applied before the stretching is a non-water-based oil agent. By applying the non-water-based oil agent before stretching, stretching can be performed favorably and a high-strength fiber can be obtained.

In the application of the oil before the drawing, it is preferable that the spun yarn be bundled at the same time, and therefore it is preferable to apply the oil before the fluid treatment by interlacing. The components of the non-water-based oil agent are not particularly limited, and may be any oil agent that is usually applied before stretching to improve convergence and stretchability.

After the stretching, an oil containing the above-mentioned dioctyl sulfosuccinate salt and polyoxyethylene alkyl ether and / or polyoxyethylene alkyl phenyl ether and having an excellent conjugating property with the paste is applied as an after oil. . This oil agent is preferably provided as an emulsion oil agent. This is because, by applying an emulsion oil, moisture penetrates into the inside of the yarn, and the paste easily penetrates. If this oil agent is applied before stretching, operability may deteriorate due to contamination of the roller, and in the case of thermal stretching, components may be deteriorated by heat. Further, the water in the imparting component evaporates during the stretching at the time of stretching, and the compatibility with the sizing agent is reduced.

The application of the oil agent after the drawing is preferably performed after the fluid treatment by the second-stage interlacer in order to improve the state of adhesion of the oil agent to the yarn.

In applying these oils, the applying means is not particularly limited, and an oiling roller, a slit nozzle or the like may be used.

The stretching method is not particularly limited. However, in order to obtain a fiber having high strength and no generation of fluff, it is preferable that stretching between rollers is performed by thermal stretching, and the stretching ratio is 1.5 times. It is preferable to make the above.

Next, an example of the manufacturing method of the present invention will be described with reference to the drawings. FIG. 1 is a schematic process chart showing one embodiment of the production method of the present invention. First, melt spinning is performed from the spinneret 1, and the yarn is cooled and solidified by the cooling device. Then, the non-aqueous oil is applied by the slit nozzle 2, and the bundle is simultaneously formed. I do. Subsequently, the film is stretched between the rollers 4 and 5 and the second
The entanglement of the step is applied, and an oil agent having a high sizing agent conjugation is applied by the slit nozzle 7, and the wound agent 8 winds up the package 9.

[0024]

Next, the present invention will be described specifically with reference to examples. In addition, measurement of the amount of oil agent attached to the fiber, the amount of gluing, and the fluff length,
Evaluation of the desizing and weaving properties was performed as follows, and the strength and elongation of the fiber and the number of entanglements were measured by the methods described above. [Oil agent adhesion amount] The measurement was carried out by the method described in JIS-L-1013 724 (4). [Attached amount of sizing agent-binding oil agent] In the same manner except that the sizing agent-attached amount (A) of the obtained fiber (both the non-water oil agent and the sizing agent-binding oil agent are applied) and the sizing agent-binding oil agent is not applied. The amount (B) of oil adhering to the fiber obtained by the production was determined by the above-mentioned measuring method.
Was calculated as the total amount of the oil agent attached, and AB was calculated as the adhesive amount of the glue-conjugated oil agent. [Amount of gluing] The obtained fibers were glued at a yarn speed of 60 m / min, a chamber temperature of 120 ° C and a cylinder temperature of 90 ° C. The obtained sized yarn is scoured at 80 to 90 ° C. for 30 minutes using a scouring agent (2 g of sodium carbonate, 1 g of sodium tripolyphosphate, 2 g of nonionic activator dissolved in 1 liter of water), and before and after scouring. The adhesive amount of the sizing agent was determined from the weight difference and calculated as a ratio to the weight of the entire fiber. [Fuzz length] The obtained fibers were glued at a yarn speed of 60 m / min, a chamber temperature of 120 ° C and a cylinder temperature of 90 ° C. With a load of 50 g applied to the obtained glued yarn 50 cm, the center of the yarn was cut with scissors. At the end of the cut yarn, the length of the part where the yarn was opened and became fluff was measured.
This was used as an index of the conjugation property of the sizing agent and the opening property of the yarn. [Glue removal] The obtained fiber has a yarn speed of 60 m / min and a chamber temperature.
Gluing was performed at 120 ° C. and a cylinder temperature of 90 ° C. The obtained glued yarn is wrapped as a warp yarn on a water jet loom type loom.
After operating for 0 m, the peeling state of the glue from the yarn was evaluated by the amount of the glue adhered to the loom and the amount of the glue dropped from the yarn. The evaluation was performed on a scale of 5 on the assumption that the amount of the glue that had fallen was 5 and the average value was evaluated 10 times. [Wovenability] Regarding the obtained fiber, the number of warp was 1196,
Warping was performed at a yarn speed of 100 m / min, a chamber temperature of 125 ° C, and a cylinder temperature of 100 ° C. And as the weft, 60d / 16
Weaving was carried out using a hollow fiber having a cross section of f and a weaving type honeycomb having a weaving machine rotation speed of 450 rpm and a weft density of 108 yarns / 2.54 cm.
At this time, the number of machine stoppages per day due to poor weaving and the rebound rate are shown.

Example 1 An experiment was performed according to the process chart shown in FIG. Relative viscosity (measured at a concentration of 1 g / dl and a temperature of 25 ° C. using 96% sulfuric acid as a solvent) 3.
Supply 51 nylon 6 pellets to the extruder,
Melt spinning was performed at a spinning temperature of 280 ° C. After applying the non-water-based oil to the spun yarn, applying and bundling the oil, the yarn was subjected to fluid treatment at an air pressure of 3.0 kg / cm ² using an interlacer and stretched 1.5 times between rollers. . Subsequently, the yarn was subjected to fluid treatment at an air pressure of 5.0 kg / cm ² using an interlacer, and a sizing agent-binding oil agent (an oil agent containing the components shown in Table 1 was diluted with water to obtain a 10% emulsion oil agent). ) And wound up at a speed of 4150 m / min to obtain a polyamide fiber (30d / 24f).

[0026]

[Table 1]

Example 2 The air pressure for fluid treatment in the interlacer after stretching was set to 4.
The procedure was performed in the same manner as in Example 1 except that the pressure was set to 0 kg / cm ² .

Comparative Example 1 The same procedure as in Example 1 was carried out except that the sizing agent-containing oil agent was not applied after the stretching (the oil agent was not applied after the stretching).

Comparative Example 2 The air pressure of the fluid treatment in the interlacer before stretching was 0.5
kg / cm ^2, and the same procedure as in Example 1 was carried out, except that the film was wound up without performing fluid treatment with an interlacer after stretching and without applying a sizing agent-binding oil agent.

COMPARATIVE EXAMPLE 3 The fluid treatment after stretching was performed by air pressure without applying the fluid treatment with the interlacer before stretching and the application of the glue-binding oil after stretching.
The same procedure as in Example 1 was performed except that the test was performed at 0 kg / cm ² .

Comparative Example 4 The air pressure of the fluid treatment in the interlacer after stretching was set to 2.
The procedure was performed in the same manner as in Example 1 except that the pressure was set to 0 kg / cm ² .

Comparative Example 5 After stretching, an oil solution containing no dioctyl sulfosuccinate salt (an oil solution containing the components shown in Table 2 was diluted with water,
10% emulsion oil) was applied, and the air pressure of the fluid treatment in the interlacer after stretching was increased to 4.0 k.
The procedure was performed in the same manner as in Example 1 except that g / cm ² was used.

[0033]

[Table 2]

Reference Example Relative viscosity (concentration: 1 g / dl, 96% sulfuric acid as solvent, temperature: 25
Measured in ° C. 3.) 3.51 nylon 6 pellets were fed to an extruder and melt spun at a spinning temperature of 280 ° C. A non-water-based oil agent was applied to the spun yarn, and the yarn was subjected to fluid treatment at an air pressure of 0.5 kg / cm ² using an interlacer, and then stretched 1.5 times between rollers and wound at a speed of 4150 m / min. . The wound yarn was again subjected to a fluid treatment at an air pressure of 2.2 kg / cm ² using an interlacer to obtain a polyamide fiber.

The fibers obtained in Examples 1 and 2, Comparative Examples 1 to 5 and Reference Example, the elongation, the number of entanglements, the amount of oiling agent, the amount of sizing agent conjugated oil, the amount of gluing, the fluff length and the size of the glue Table 3 shows the evaluation of weaving properties.
Shown in

[0036]

[Table 3]

As is clear from Table 3, according to Examples 1 and 2, a high-fineness, high-fineness polyamide fiber having less fluff and high quality can be obtained. Good conjugation properties were obtained, and a high-density woven fabric with good weaving properties and good texture was obtained. And, in the reference example, the wound yarn was again subjected to fluid treatment to impart entanglement,
The fibers of Examples 1 and 2 show the confounding obtained in Reference Example 6
It had properties such as a sizing agent conjugation property and a weaving property, which were equivalent to those of the fiber given 0 fibers / m. On the other hand, in Comparative Example 1, the sizing agent was not applied, and in Comparative Example 2, the interlacing treatment and the application of the sizing agent were not performed after stretching. In Comparative Example 3, the interlacing treatment was performed before stretching and after the stretching. Since no sizing agent was added, the number of entanglements in Comparative Example 4 was less than 35 / m.
However, since no oil agent containing a dioctyl sulfosuccinate salt was given, these fibers had poor conjugation with the sizing agent during production, a large amount of sizing, and poor weavability.

[0038]

Industrial Applicability The polyamide fiber of the present invention has a fine fineness and high strength, and has good conjugation property with a sizing agent. Therefore, it does not fall off during weaving, has a good texture, and is suitable for sports and clothing. It is possible to obtain a high density woven fabric with good weaving properties. Further, according to the production method of the present invention, it is possible to produce a high-quality fine-fiber high-strength polyamide fiber having no fluff or the like with high productivity by the direct spinning and drawing method.

[Brief description of the drawings]

FIG. 1 is a schematic process chart showing one embodiment of a process for producing a fine-fiber high-strength polyamide fiber of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Spinneret 2 Slit nozzle 3 Interlacer 4 Roller 5 Roller 6 Interlacer 7 Slit nozzle 8 Winding machine 9 Package

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁶ Identification symbol FI D02J 1/22 D02J 1/22 H D06M 15/53 D06M 15/53 // D01D 5/16 D01D 5/16 (72) Inventor Yoshinori Tsukada 5 Unitika, Uji-Tonouchi, Uji-city, Kyoto (72) Inventor Masahiro Hosoda 5 Uji-Tonouchi, Uji-shi, Uji, Kyoto, Japan

Claims (2)

[Claims] 1. Total denier 35 denier or less, strength 6.0
g / denier or more, the number of confounds is 35 / m or more, and an oil agent containing dioctyl sulfosuccinate salt and polyoxyethylene alkyl ether and / or polyoxyethylene alkyl phenyl ether is provided. Fine fiber high strength polyamide fiber. 2. A method for producing a polyamide resin by a melt spinning method, cooling the spun yarn, stretching the yarn between rollers, and winding the polyamide resin at a speed of 3000 m / min or more. And afterwards the yarn is subjected to fluid treatment with an interlacer to impart confounding, and before drawing, impart a non-water-based oil agent,
An oil containing a dioctyl sulfosuccinate salt and a polyoxyethylene alkyl ether and / or a polyoxyethylene alkyl phenyl ether is provided as an after oil after stretching.
A method for producing the high-fine-strength polyamide fiber according to the above description.