KR102042351B1 - Method Of Manufacturing New―Amide Nylon 4,6 Blended Knits Having Excellent Moisture Regain And Stretchability - Google Patents

Abstract

The present invention provides a blended knitted fabric having excellent hygroscopicity and elasticity by knitting using a new amide nylon 4,6/latent and potential crimped air-textured yarn and hydrophobic synthetic fiber filament/latent and potential crimped air-textured yarn. The present invention can provide a knitted fabric excellent in water absorption and diffusion from the back side to the surface and excellent in elasticity, by using an air-textured yarn in which the new amide nylon 4,6 fiber, exhibiting hygroscopicity comparable to cotton fiber which is a natural fiber, while having fiber properties similar to nylon 6, is combined with other fibers.

Description

Method of Manufacturing New--Amide Nylon 4,6 Blended Knits Having Excellent Moisture Regain And Stretchability}

The present invention is to provide a composite knitted fabric having excellent hygroscopicity and elasticity by knitting with hydrophobic synthetic fiber ATY yarn using neoamide nylon 4,6 fibers and latent crimped filaments exhibiting hygroscopicity comparable to cotton fibers which are natural fibers.

Nylon 6 fiber has many advantages such as relatively good hygroscopicity (process moisture content of 4.5%), excellent rigidity, elastic recovery rate, and dyeing property, but the price is being pushed out in the market due to the high price of PET fiber.

On the other hand, cotton fiber, a natural fiber, has excellent hygroscopicity (8.5% moisture content) and excellent touch, but it has a disadvantage in that it is poor in fast drying, lacks UV protection for outdoor clothing, and is very expensive. The emergence of innovative clothing synthetic fibers, which have superior hygroscopicity comparable to cotton and possesses fiber properties similar to that of cotton, is cheaper than cotton.

Recently, the pilot scale level of nylon 4 has been resumed, mainly by the Japan Institute of Industrial Technology (AIST), which is manufactured using 2-pyrrolidone obtained from biomass rather than chemical synthesis, thanks to the international low carbon eco-friendly flow. As a so-called "biomass-derived polymer," Nylon 4 polymerization research is again receiving attention.

Thus, Korean Patent Publication No. 10-2015-0042487 provides a method for producing polyamide, which is used in an amount such that the average carbon number per one amide group included in the polyamide is 4 to 6, but the filament manufactured More research is needed on the application of.

In addition, when knitting with hydrophobic synthetic fiber yarn using the cyanamide nylon 4,6 fiber, the strength of the knit fabric may be lowered due to the low strength of the cyanamide nylon 4,6 fiber.

In addition, air texture yarns of nylon 4 and 6 fibers and spandex fibers were also developed in order to produce excellent stretch fabrics. However, moisture absorption was poor due to poor moisture absorption, and embrittlement caused by heat was generated, resulting in a decrease in tensile strength.

Republic of Korea Patent Publication No. 10-2018-0011957 (February 05, 2018)

Therefore, the present invention has a fiber property similar to Nylon 6, while using a new amide nylon 4,6 fiber exhibiting hygroscopicity comparable to cotton fiber which is a natural fiber, by air texturing with latent crimped filament to improve elasticity and absorbency surface It is a technical problem to provide a knitted fabric having excellent water absorption and diffusivity.

Therefore, according to the present invention, the new yarn nylon 4,6 / latent crimped air texture yarn as the surface yarn, hydrophobic synthetic fiber filament / latent crimped air texture yarn as the backside yarn through the separate steep value of the steep yarn of the backside yarn compared to the surface yarn New amide nylon 4,6 with excellent hygroscopicity and elasticity, which is supplied to the circular knitting machine so that the transmission ratio is 80 to 85%, and the circular knitting is performed so that the loop length of the surface yarns is 7-8cm / 51W, and the loop length of the backside yarns is 8-10cm / 51W. A method for producing a composite knitted fabric is provided.

Hereinafter, the present invention will be described in more detail.

The present invention uses the new amide nylon 4,6 fibers and latent crimped filaments that have similar physical properties to nylon 6 fibers and exhibit hygroscopicity comparable to cotton fibers, which are natural fibers. The present invention relates to providing an excellent composite knitted fabric.

The new amide nylon 4,6 fibers of the present invention have an average carbon number of 4 to 6 per amide group included in the polyamide disclosed in Korean Patent Publication No. 10-2015-0042487 (published on April 21, 2015). It is a filament excellent in hygroscopicity as a fiber spun by using the polyamide polymer manufactured by the manufacturing method of polyamide which is used by the quantity.

The new amide nylon 4,6 filament is a highly hygroscopic fiber having a moisture absorption of 7% or more. In the present invention, the polyester-based latent crimped filament having a fineness of 40 to 75 d / 12 to 24 fila is used as an effect yarn having a fineness of 70 to 75 d / 36 fila. New amide nylon 4,6 filaments are air textured with new amide nylon 4,6 / latent crimped air texture yarns as surface yarns and hydrophobic synthetic filament / latent crimped air texture yarns as backside yarns. It is to produce a knitted fabric of a dual structure.

When the circular knitting of the present invention, the feed yarn gear ratio of the back yarn to the surface yarn is 80 to 85% by supplying to the circular knitting machine so that the loop length of the surface yarn 7 ~ 8cm / 51W, the loop length of the back yarn is 8 ~ 10cm / 51W. The 'W' in the loop length unit stands for 'Wale', meaning that the loop length of 51 wales is the same as above. If the feed yarn ratio of the back yarn to the surface yarn is 80 to 85%, the loop length of the surface yarn and the loop length of the backside yarn are different as described above.

The ratio of the surface yarns to the backside yarns is preferably 50:50 to 60:40 weight ratio for water absorption and diffusion.

The surface yarns of the new amide nylon 4,6 / latent crimping air texture company supply the polyester-based latent crimping filament having a fineness of 40-75d / 12-24fila through the screening agent 1 feed roller and the screening agent 2 feed roller. Pass the new amide nylon 4,6 filament with fineness of 70 ~ 75d / 36fila through the first feed roller for effector, pass the hot fin at 130 ~ 150 ℃ and draw ratio 1.2 ~ 1.4 with the second feed roller for effector New amide nylon 4,6 / wound up at 150 to 300 m / min after passing through the third feed roller and the fourth feed roller after air texturing with an air pressure of 10 ~ 14㎏ / ㎠ from the air texture nozzle. It is preferable to use latent crimped air texture yarns.

By using nylon 4,6 filament having excellent hygroscopicity as effect yarn and polyester latent crimped filament with fineness of 40 ~ 75d / 12 ~ 24fila with excellent elasticity as screening, airtextured air texture yarn (ATY) is used as surface yarn. It is possible to improve the hygroscopicity and the elasticity. In addition, by using together a non-woven polyester cross-section latent crimp filament having a cross-section of the dumbbell cross-section may be improved hygroscopicity by capillary phenomenon formed on the cross-section.

When the air texturing is performed, the overfeed rate is supplied between 15 and 20% between the second feed roller and the third feed roller. When the overfeed rate is less than 15%, the air texture is not smoothly combined with the effect yarn. The yarn loops may be lowered and the elasticity may be reduced, and if the overfeed rate exceeds 20%, there is a problem in that the yarn is reduced and the yarn is thick due to excessive looping. Meanwhile, the nylon 4,6 filament supplied to the effector is supplied with a feed roller for a separate effect, and the overfeed rate is supplied at 5 to 7%. However, when the overfeed rate is less than 5%, the entanglement is poor and the loop expression is reduced. If the overfeed rate exceeds 7%, the screening may be out of effect or cause loop stability and elongation.

In the present invention, the hydrophobic synthetic fiber filament / latent crimped air texture yarn, which is the back side yarn, passes through a first feed roller and a second feed roller for screening with a polyester-based latent filament having a fineness of 40 to 75 d / 12 to 24 fila as a screening. After passing the polypropylene filament with fineness of 70 ~ 75d / 36fila through the first feed roller for effect use, pass the hot fin at 100 ~ 120 ℃ and draw ratio as 1.1 ~ 1.3 with passing through the second feed roller for effect use. Hydrophobic synthetic filament / potential crimped air texture yarn wound at 150 ~ 300 m / min after passing the third feed roller and the fourth feed roller after air texturing with air pressure of 9 ~ 11㎏ / ㎠ Is preferable for water absorption and diffusion from the back side to the surface, and especially water absorption and expansion by capillary phenomenon of yarn cross section by polyester latent crimping filament. More it preferred for.

Therefore, according to the present invention, the Spandex ATY is used as a surface yarn using the new amide nylon 4,6 filament and latent crimped filament ATY yarn having hygroscopicity comparable to cotton fiber, which is similar to nylon 6, while having fiber properties similar to those of nylon 6. It is possible to provide a knitted fabric having excellent elasticity at the level of the used knitted fabric, but having excellent water absorption and diffusion from the back side to the surface.

1 to 8 are physical property test reports of knitted fabrics of Example 1 and Comparative Example 1 of the present invention.

The following examples give a non-limiting illustration describing a method for producing a neoamide nylon 4,6 composite knitted fabric having excellent hygroscopicity and elasticity.

Example 1

The polyester-based latent filament having a fineness of 50d / 24fila is supplied through the screening agent 1 feeder and the screening agent 2 feed roller, and the effector uses the new amide nylon 4,6 filament having a fineness of 70d / 36fila as the first feed roller. After passing through the hot fin at 140 ℃ and the draw ratio is 1.2 to supply while passing through the second feed roller for effect use, after air texturing with air pressure 14㎏ / ㎠ in the air texture nozzle and the second feed roller for the screening and the third Overfeed rate is 15% among feed rollers, and overfeed rate is 7% between 2nd feed roller and 3rd feed roller using the feed roller. After passing the 3rd feed roller and 4th feed roller, it is wound at 200m / min. A new amide nylon 4,6 / latent crimped air texture yarn was prepared and used as surface yarn.

The polyester-based latent filament with fineness of 50d / 24fila is passed through the screening agent 1 feed roller and the screening agent 2 feed roller through screening, and the polypropylene filament with fineness of 75d / 36fila is passed through the effective feeder 1 feed roller After passing through the hot fin of 120 ℃ and the draw ratio is 1.1 to feed the second feed roller through the effect use, and after the air texturing at 11kg / ㎠ air pressure in the air texture nozzle, the third feed roller, the fourth feed roller After coarse, the hydrophobic synthetic fiber filament / latent crimped air texture yarn wound at 150 m / min was used as the backside yarn, and the surface yarn and the backside yarn were supplied to the circular knitting machine through separate steep spinners according to the conditions shown in Table 1 below. Dyeing prepared the composite knitted fabric of Example 1.

The hygroscopicity, strength, and fastness test results of the fabrics are shown in Tables 2 and 3.

division Example 1 Gauge-width (gg-in) 28-30 Yarn used surface New amide nylon 4,6 / latent crimped air texture Back side Polypropylene Filament / Latent Crimp Air Texture Surface loop length 8 Back side roof 10 Weight (g / ㎡) 140 Width (in) 60 Course Density (C / in) 40 Whale Density (W / in) 43

Comparative Example 1

After supplying spandex filament with fineness 45d / 3fila through the screening agent 1 feeder and the screening agent 2 feed roller, supply the new amide nylon 4,6 filament with fineness 70d / 36fila through the 1st feed roller Pass through the hot fin at 140 ℃ and draw ratio is 1.5, passing through the second feed roller for effect use, after air texturing with air pressure 14㎏ / ㎠ in the air texture nozzle, between the second feed roller and the third feed roller for screening The overfeed rate is 10% and the effective feed rate between the second feed roller and the third feed roller is 10%. The overfeed rate is 10% and the neoamide nylon wound at 200 m / min after passing the third feed roller and the fourth feed roller. 4,6 / Spandex air texture yarns are manufactured and used as surface yarns,

After supplying spandex filament with fineness of 45d / 3fila through the screening agent 1 feed roller and the screening agent 2 feed roller, supply the polypropylene filament with fineness 75d / 36fila through the 1st feed roller for effect. After passing through the second feed roller, the draw ratio is 1.5, and after passing through the third feed roller and the fourth feed roller after air texturing with air pressure 15㎏ / ㎠ in the air texture nozzle, the firing speed is 150 m / Using a hydrophobic synthetic fiber filament / spandex air texture yarn wound in minutes as a backside yarn was knitted under the conditions of Table 2 below.

division Comparative Example 1 Gauge-width (gg-in) 28-30 Yarn used surface Shinamide Nylon 4,6 / Spandex Air Textures Back side Polypropylene Filament / Spandex Air Texture Surface loop length 11 Back side roof 12 Weight (g / ㎡) 145 Width (in) 60 Course Density (C / in) 42 Whale Density (W / in) 45

division Example 1 Comparative Example 2 Remarks Absorption rate (sec) <1 <3 KS K 0815: 2008.6.27. A law Absorption rate (mm) 90 mm (whale)
91 mm (course) 66 mm (whale)
67 mm (course) KS K 0815: 2008.6.27. B law Elongation 85.8 (Wale), 62.9 (Course) 80.9 (Wale), 83.5 (Course) KS K 0642: 2016.8.16. D law Elongation recovery 98.7 (Whale),
96.0 (course) 97.7 (Whale),
95.7 (course) KS K 0642: 2016.8.16.2 E Act

When the physical properties of the knitted fabrics of Example 1 and Comparative Example 1 were compared, the elongation rate and the elongation recovery rate were similar, and both of them had excellent elasticity. The speed was found to be excellent.

Claims (5)

The polyester-based latent crimping filament with fineness of 40 ~ 75d / 12 ~ 24fila is passed through the screening agent 1 feed roller and the screening agent 2 feed roller. After passing the filament through the first feed roller for effect, pass the hot fin at 130 ~ 150 ℃ and draw ratio 1.2 ~ 1.4 to pass through the second feed roller for effect use, and air pressure 10 ~ 14㎏ / ㎠ from air texture nozzle After the air texturing with the third feed roller and the fourth feed roller, the new amide nylon 4,6 / latent crimped air texture yarn wound at 150 to 300 m / min.
The screening system supplies polyester latent crimping filament with fineness of 40 ~ 75d / 12 ~ 24fila through the 1st feed roller and 2nd feed roller for screening. After passing through the first feed roller, pass the hot fin at 100 ~ 120 ℃ and draw ratio is 1.1 ~ 1.3 to supply through passing the second feed roller.The air texturing is carried out with air pressure of 9 ~ 11㎏ / ㎠ After passing through the third feed roller and the fourth feed roller, the hydrophobic synthetic filament / latent crimped air texture yarn wound at a yarn speed of 150 to 300 m / min was used as a back yarn, respectively. It is supplied to the circular knitting machine so that the sudden gear shift ratio is 80 to 85%, and the circular yarn has a loop length of 7 to 8 cm / 51 W and the rear thread is 8 to 10 cm / 51 W. Polyimide nylon 4,6 method of producing a composite knitted fabric. The method of claim 1,
The ratio of the surface yarn and the backside yarn is 50:50 ~ 60:40 weight ratio, characterized in that the excellent hygroscopic and stretchy neoamide nylon 4,6 composite knitted fabric production method. delete The method of claim 1,
In the manufacture of the surface yarn, the overfeed rate is 15-20% between the second feed roller and the third feed roller, and the overfeed rate is 5-7% between the second feed roller and the third feed roller. A method for producing a new amide nylon 4,6 composite knitted fabric having excellent hygroscopicity and elasticity. delete

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