JPH0284552A - Nylon 66 yarn - Google Patents

Abstract

PURPOSE:To obtain the subject stable yarn free from generation of white powder by using nylon 66 multifilament having specific birefringence and elongation at break and applying a lubricant containing an ethylene oxide adduct and a specific liquid higher fatty acid to the multifilament. CONSTITUTION:The objective nylon 66 yarn is composed of a nylon 66 multifilament having a birefringence of 0.035-0.045 and an elongation at break of 50-100% and is coated with 0.3-1.5wt.% (based on the filament) of a lubricant containing (A) 3-18wt.% of an ethylene oxide adduct such as an ethylene oxide adduct of a higher alcohol, polyethylene glycol and polyoxyalkylamine ethylene oxide adduct, (B) 4-30wt.% of a liquid higher fatty acid having 2-20C alkyl group (e.g., propionic acid) and (C) 93-52wt.% of a smoothing agent (e.g., mineral oil) and an antistatic agent (e.g., an imidazoline compound).

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to nylon 66 yarn. For more details, see 3.
Regarding nylon 66 multifilament obtained by spinning at a high speed of 000 to 6000 m/min, there is no post-processing (user) even after the multifilament is stored for a long time.
The process performance is not deteriorated. That is, the present invention relates to a multifilament that does not cause whitening during warping, knitting, etc. even after a long period of time.

[Conventional technology]

In recent years, high-speed spinning has been used to reduce costs in the production of nylon fibers.

High speed spinning of nylon is generally 3000-6000m/
min, preferably 4000 to 6000 m/m
It is usually done in. The nylon fibers spun in this way are characterized by a cutting elongation of 50 to 100%, a birefringence index of 11 in the range of 0.035 to 0.045, a soft texture, and uniform dyeability. Because of this, it is used not only in the false twisting field, but also in a wide range of applications such as textiles and tricot fields.

However, when nylon 66 multifilament is coated with a conventional emulsion-based lubricant during the high-speed spinning process and warped as tricot or textile warp, the nylon 66 multifilament runs in contact with guides and reeds. At that time, some of the white powder adhering to the surface of the single yarn falls off, and most of it adheres to the guides and reeds, and as the warper ages, the amount of adhesion increases, and the tension increases abnormally, causing yarn breakage, which causes problems. It has become.

On the other hand, an oil agent applied during high-speed spinning of polyamide filaments has been proposed in Japanese Patent Publication No. 31931/1983 for the purpose of improving fabric defects (warp stripes) caused by oil agents mainly containing oil oleate. In addition, JP-A-60-215872 discloses an oil composition for nylon 6 POY (mainly composed of a copolymer compound of ethylene oxide and propylene oxide) that has good processability and yields high-quality processed yarn (with little fuzz). has been proposed.

However, when these oil compositions are applied to nylon 66 multifilament in a high-speed spinning process, a problem arises in that white powder increases in the warper or knitting process if used after long-term storage (for example, 10 months).

In addition to the above, there have been no proposals regarding oils for high-speed spinning nylon 66 multifilament, and if a normal oil is used for high-speed spinning by sliding it as it is, after a long period of storage, if the nylon 66 multifilament is used, it will turn white. There is a problem that occurs.

In the clothing field of high-speed spinning, there is a known technology (Japanese Patent Publication No. 60-372) that applies a Stretch oil (non-water-containing oil) during the spinning process.
In this case, although it is possible to spin the white powder, it is filled with oil smoke due to the scattering of the oil agent during the spinning stage, and a large-scale recovery device is required to remove this, resulting in an increase in costs. There is.

[Problems to be Solved by the Invention] As a result of intensive research on the generation of white powder, the present inventors have found that the white powder of nylon 66 multifilament spun at high speed is produced by the emulsifier ethylene oxide [(hereinafter referred to as EO)]. We obtained the surprising finding that there is a close relationship with the content of adducts.

The inventors of the present invention have conducted intensive studies on the formulation of an oil agent that provides a stable emulsion, is inexpensive, satisfies post-processing performance, and reduces the amount of emulsifier as much as possible.The inventors have found that by using a combination of liquid higher fatty acids and EO adducts of emulsifiers, EO We have discovered a formulation method that allows emulsions to be stable even when adducts are eliminated to the maximum extent possible.

An object of the present invention is to provide a nylon 66 yarn as described above that does not produce white powder.

[Means for solving problems]

The present invention has a birefringence Δn of 0.035 to 0.045,
A nylon 66 yarn ethylene oxide adduct consisting of a nylon 66 multifilament having a cutting elongation of 50 to 100%, and containing an oil agent containing the following components in an amount of 0.3 to 1.5% by weight based on the filament. 3 to 18% by weight Liquid higher fatty acid having an alkyl group having 2 to 20 carbon atoms 4 to 30% by weight Smoothing agent and antistatic agent 93 to 52% by weight.

In the present invention, the EO adduct refers to the [0
Adducts and IEO/PO adducts, PEG esters, castor oil IEO adducts and EO/PO adducts, Sorbitan E
O adduct, phosphorus antistatic agent no adduct, nonylphenol E
Examples include O adduct, polyethylene glycol, polyoxyalkylamine, trimethylolpropane EO adduct, and the like. The number of moles of EO may be 1 to 60.

If the EO adduct of the emulsifier is less than 3% by weight, the stability of the emulsion cannot be obtained, and there is a fear of staining spots in post-processing.

If the EO adduct of the emulsifier is 18% by weight or more, white powder will increase. Therefore, when the EO adduct is in the range of 3 to 18% by weight, the emulsion is stable and there is little white powder.

More preferably, the content is in the range of 3 to 10% by weight.

Liquid higher fatty acids include propionic acid, butyric acid, acrylic acid,
Examples include oleic acid.

If the liquid higher fatty acid content is less than 4% by weight, separation of the emulsion tends to occur, and if it is more than 30% by weight, the amount of the smoothing agent decreases and the smoothness deteriorates, which is not preferable. Therefore, a range of 4 to 30% by weight is preferable.

When the number of carbon atoms in the alkyl group of the fatty acid is 1, the degree of acidity is strong and the needles of the tricot knitting machine will rust. Furthermore, if the alkyl group has 20 or more carbon atoms, the emulsification of the emulsion cannot be improved because the alkyl group is in a solid state.

Therefore, it is preferable that the alkyl group of the higher fatty acid has 2 to 20 carbon atoms and is liquid at room temperature.

It is not well understood why the combined use of the EO adduct of the emulsifier and the higher fatty acid improves the emulsifying property even if the EO adduct of the emulsifier is reduced, but it is probably thought to be a synergistic effect.

The smoothing agent is preferably a mineral oil or ester type smoothing agent with low viscosity. The antistatic agent may be an imidapurine-based antistatic agent, a phosphorus-based antistatic agent, a sulfonate salt, an amine-based antistatic agent, or the like.

If the amount of oil applied during spinning is less than 0.3% by weight, smoothness cannot be maintained and thread breakage is likely to occur, and 1.5% by weight.
The above is not preferable because white powder increases. Therefore, the amount of oil adhered to nylon 66 multifilament is 0.
．． 3 to 1.5% by weight is good, more preferably 0.5 to 1% by weight.
．． 0% by weight is good.

The oil composition for high-speed spun nylon 66 yarn of the present invention has a white powder reducing effect on filaments having a breaking elongation of 50 to 100%, and has a white powder reducing effect on ordinary nylon 6 and nylon 66.
However, conventional oils containing 20 to 40% by weight of E0 adducts may be used.

What is the oil adhesion amount? Nylon 66 multifilament 2.0
6 g was added 4 times using 3 cc of dichloromethane using a rapid residual fat extraction device manufactured by Tokai Keiki Co., Ltd. (heating section 110'C).
This refers to the value extracted and calculated using the following formula.

(Residual fat amount (g) 72g) x 100 [%] The oil component attached to the thread was extracted from a sample of nylon 66 multifilament with carbon tetrachloride using column chromatography and preparative GrC (gel permeation chromatography). Separate and quantify each fraction using IR (infrared spectrophotometer) G.
It can be analyzed using PC and GLC (gel liquid chromatography).

Next, the present invention will be specifically explained with reference to Examples.

〔Example〕

Nylon 66 polymer is melted and discharged using a spinneret with 13 spinning holes, cooled with cold air in a chamber under the spinneret, and in the spinning process, the following water emulsion oil (10% by weight) is applied to the yarn. , 7% by weight was applied and rolled up into a cheese shape with a winder at 4000 m/min without stretching, using a 40d/13f nylon 66 multifilament. The emulsion stability and white powder generation of the emulsion used in the spinning process were examined over nine rounds.

The oil agent used in the present invention and the conventional formulation are shown below. The content of IEO adducts is shown in the right column of the oil agent name, and EO adducts are indicated with a * mark in the left column.

Compounded oil No. 1 1EO adduct 3% by weight mineral oil 60 seconds (Letwood viscosity > 67.9% by weight
*PEG400 dilaurate 3.0% by weight Maggo Alcohol Surunenate! J a salt 14, 2
ffi It% Oleylimidacillin 5.
3% by weight Oleic acid 9.6% by weight
Compounded oil No. 2 EO adduct 2 ethylhexyl palmitate *POE (5) Lauryl ether mafcoalcohol sulnenate Na salt oleyl imida cillin oleic acid 5% by weight 66% by weight 5% by weight 14.2% by weight 5 .2% by weight 9.6% by weight Compounded oil No. 3 EO adduct mineral? III 60 seconds (Leftwood viscosity) i Octyl stearate * I) OE (25) Castor oil ether * POE (5)
Lauryl ether *POE (7) Oleyl phosphate Na salt MAFCO
7B Colesurunenate NaW*POE (10) Stearylamine Potassium Acetate Oleic Acid Compound Oil No. 4 No Additive Mineral' Mountain 100 seconds (Retwood viscosity)*POE
(5) Lauryl ether*I”On (3) Lauryl phosphate Na salt 7 Tuco alcohol Surnene) Na salt Oleylimidacillin combination oil agent No. 5 EO additive i Octyl stearate 18.2% by weight 10.8 weight % 64.4% by weight 8.6% by weight 3.2% by weight 2.1% by weight 2.1% by weight 4.3% by weight 0.3% by weight 4.2% by weight 20% by weight 75% by weight 18% by weight 2% by weight 1% by weight 4% by weight 35.7% by weight 60.7% by weight *POE (25) Castor oil ether *POE (5) Lauryl ether *POIE (10) Stearylamine oleyl imidazurin combination oil agent No. 6 EO adduct mineral oil 100 seconds (Leftwood viscosity) *POE (20) Sorbitan triolate *PO
E (3) lauryl phosphe~) Na salt oleyl imidapurine combination oil agent Nα7εO adduct mineral origin 100 seconds (redwood viscosity) 2ethyl hexyl palmitate * POE (5) lauryl ether oleyl imidacillin combination Oil No. 813.0 Adduct Mineral Mountain 60 seconds (Redwood viscosity) Matsuko Flucoe) ■ Surbonate Na salt 8.9% by weight 17.9% by weight 8.9% by weight 3.6% by weight 44% by weight % 50% by weight 40% by weight 4% by weight 6% by weight 35% by weight 31% by weight 31% by weight 35% by weight 3% by weight 0% by weight 66% by weight 14% by weight Oleylimidapurine 5% by weight Oleic acid
15% by weight [Test method] <Emulsion stability of emulsion> The above-mentioned blended oils No. 1 to No. 8 were emulsified in warm water (pure water) to create an emulsion with an oil concentration of 10% by weight. . 400 cc of this emulsion was sampled, placed in a 500 cc beaker, and left open in a room at room temperature for 3 days.The state of oil separation on the surface layer of the emulsion was evaluated with the naked eye on the following three levels.

× Lots of oil separation (unable to operate) 8. There is some oil separation (operation possible) ○ Can be operated without oil separation) The results are shown in Table 1.

White powder test> The blended oils Nα1 to No. 7 shown in L were emulsified in warm water to create an emulsion with an oil concentration of 10%. When spinning nylon 66 multifilament at 4000 m/min using this 10 wt% emulsion, 0.7 wt% of the oil component was applied using a gear pump before the winder (winding), and 40d/13f cheese was wound. I took it.

Place this cheese in a drum (metal container) shown in Figure 1 with 3 liters of water.
Put it in together with 1 and completely seal it with a lid with a rubber seal.

After leaving this drum in a room controlled at 50° C. for one week, the drum is taken out, the lid is opened, and the nylon 66 multifilament cheese is taken out. This nylon 66 multifilament is passed through a guide 2.3 using the device shown in Fig. 2, and then passed through a reed 4 at a speed of 600 m/m.
The white powder that fell off and the white powder that adhered to the reed was collected (collected), and the amount of white powder and the amount of running thread were measured using a Mettler balance. Calculate ffi (mg).

The white powder results are shown in Table 1 and Figure 3.

As is clear from Table 1 and Figure 3, the amount of white powder generated has a strong correlation with the content regardless of the type of EO adduct in the emulsifier.
White powder increases when the content of EO adducts is high. Therefore, it can be concluded that the main cause of white powder precipitation is EO adducts.

Conventional Nos. 4 to 7 have a high content of EO adducts, and although the emulsions are stable, they have a fatal drawback of having a large amount of white powder.

On the other hand, Na 1 to 3 of the present invention have good emulsion stability and very little white powder, achieving the objective.

No. 8 indicates poor emulsification (white powder evaluation was discontinued) and is N.
Since the emulsion stability of No. 3 and No. 3 cannot be said to be completely good, it can be said that No. 1 contains an adduct with EO.

〔Effect of the invention〕

The high-speed spun nylon 66 yarn of the present invention is coated with an inexpensive water emulsion oil with good emulsion stability during the spinning process using a gear pump system or oiling roll system in an amount of 0.3 to 1.5 of the oil applied to the yarn. % by weight, more preferably 0.5
Conventional 150-380mg/kg when added at ~1.0%
The amount of white powder generated can be reduced to 20 to 110 g/kg.

Therefore, when the high-speed spun nylon 66 multifilament coated with an oil agent of Nα 1 to 3 shown in the examples is warped and knitted for warp yarns or tricone yarns, it is possible to achieve stable performance without white powder. Become.

[Brief explanation of drawings]

FIG. 1 shows a schematic diagram of a humidity control device using nylon 66 yarn. FIG. 2 shows a schematic diagram of the white powder testing apparatus. Figure 3 is EOO
A graph showing the relationship between the content of additives and the amount of white powder generated is shown. Drum lid, 2; Drum 200P, 3: Water 3P.
, 4: Nylon 66 thread (40d/13f), 5: Wire mesh, 6: Nylon 66 thread (40d/13f), 7, 8 guide, 9: Reed 22G, 10: Winder (600m/m
in) Patent Applicant Asahi Kasei Industries Co., Ltd. Figure 1 Figure 3 Figure 2 EO with EO@Miya Yuto O Honsashiko Product/u$go (##4 Koushiri kr) EO: Edge Ref Oxide (CtH40) (!

Claims (1)

[Claims] Birefringence Δn is 0.035 to 0.045, and cutting elongation is 5.
Nylon 66 yarn (a) ethylene oxide added, which is made of 0-100% nylon 66 multifilament and has an oil agent containing the following three components in an amount of 0.3-1.5% by weight based on the filament. 3 to 18% by weight (b) Liquid higher fatty acid whose alkyl group has 2 to 20 carbon atoms 4
~30% by weight (c) Smoothing agent and antistatic agent 93-52% by weight