KR102569123B1 - Process Of Producing Environmental Friendly Down-Proof Fabrics Using Non-Circular Cross-Section Recycled Nylon Yarn - Google Patents

Abstract

The present invention relates to a method for manufacturing an eco-friendly down-proof fabric using non-coating down-proof material with recycled nylon yarn having excellent covering properties. It can solve the problem of DOWN decay, and can manufacture HIGH GROSSY DOWN PROOF fabric with high-temperature thermal calendula as its surface while maintaining air permeability.

Description

Manufacturing method of eco-friendly down-proof fabric using non-circular cross-section recycled nylon yarn {Process Of Producing Environmental Friendly Down-Proof Fabrics Using Non-Circular Cross-Section Recycled Nylon Yarn}

The present invention relates to a method for manufacturing an eco-friendly down-proof fabric using a non-coating down-proof material that is excellent in covering properties and recycled nylon yarn with a special cross-section.

Down is the hair covering the surface of the body of a bird, and in particular, refers to downy hair on the chest of a bird. Because these chest downs are softer and finer than feathers, they can hold a lot of air, so the air layer has the effect of blocking heat conduction, so it has excellent warmth.

These down materials are largely divided into duck down and goose down. Duck down has less warmth than goose down, but is relatively inexpensive, so it is often used as quilt cotton. Because it is high, it is mainly used as a material for padding.

The down material is a combination of hair root and downy hair. The hair root part is composed of hard keratin to be fixed to the bird's skin, and the downy part is mainly composed to function as a warming and cushioning function. The thermal insulation power of down material is expressed from the amount of down material used and fill power. Fill power is the resilience that swells when 1 ounce (28 grams) of down is compressed for 24 hours and then inflated to return to its original state. is expressed in cubic inches (Inch3).

In other words, down materials are classified as high-quality down products with high fill power representing the resilience of the material. If the fill power is 600 or more, it is classified as high-grade down, and if it is 800 or more, it is classified as premium down. When the same weight is used, the higher the fill power value, the better the resilience, and the heat retention and lightness are excellent, so it is traded at a high price.

Since the pointed and hard dead skin cells of the down material act like a "needle" that allows the down material to escape between the fibers, it is difficult to prevent the down material from falling out with ordinary fabric itself, so it is a fabric woven with high density After packing the down first, it is sewn again to the padding, or after weaving to make the yarn denser, chemical post-processing is used to prevent the down material from escaping. It is called 'proof'.

In general, the method used to prevent leakage of down material is to make a separate down bag, then fill the down bag with down material and go through a separate sewing process. This is the surest way to prevent feather loss, but the manufacturing process is complicated and As the weight of the final product increases, it is difficult to secure lightness.

A method developed to improve the downside of such a down bag and secure warmth and lightness at the same time was developed as a process that minimizes the escape of down by coating the surface of the fabric with the Down-proof Coating method. This material was applied to a down jumper, and since hair can be inserted directly into the fabric without a separate down bag, the amount of fabric used is less than that of conventional down jumpers, so it is applied to a lightweight down jumper with excellent activity and warmth due to its light weight.

However, since this fiber coating method has poor air permeability compared to conventional down bags, if the padding is stored for a long time in a wet state in the rain, the down material may rot due to lack of ventilation, and the material of the padding itself is thick and stiff. The downside was that it was uncomfortable to wear.

Recently, ultra-light down padding clothing, which is more lightweight than down bags or down-proof coatings and has excellent eco-friendliness and ventilation, is widely used. has some disadvantages to bear.

The most recently developed material for ultra-light down padding is a method of minimizing pores by high-temperature calendering in the final stage of dyeing and processing after weaving synthetic fibers that undergo thermal deformation by heat at high density, and there is no coating. It is in the limelight as an eco-friendly material because it has excellent air permeability, is lightweight, and does not have coating.

Down-proof fabric manufacturing technology without such coating is a technology that can pursue high value-added and high sensitivity of padding material. Since the manufacturing technology of down-proof padding material using the is not universal, related technology development is required.

Korean Patent Publication No. 10-2012-0032528 (published on April 05, 2012)

Therefore, the present invention solves the problems of the existing manufacturing method, uses a deformed cross-section yarn with excellent covering properties as a non-coating down-proof material, and provides down-proof properties by a physical processing method rather than a chemical one. The technical task is to provide a method for manufacturing an eco-friendly down-proof fabric using a modified cross-section recycled nylon yarn that can fundamentally solve the environmental problems and the problems caused by the emission of harmful substances in a way.

Therefore, according to the present invention, Y-shaped or cross-shaped modified cross-section recycled nylon yarns are used as warp and weft yarns, and after sizing the warp yarns,

The warp and weft yarns have a warp density of 179 to 185 yarns/inch and a weft density of 185 to 190 yarns/inch in a plain weave structure with a fabric weight of 33 to 75 g/sqm and a cover factor of 18.0 to 18.5 After weaving,

After the pretreatment process of improving the whiteness of the fabric by treating it with the pretreatment liquid,

After scouring and dyeing, post-processing is performed by padding in a post-treatment liquid containing 0.5 to 1.5% by weight of a high-concentration silicone tear enhancer. A method for manufacturing an eco-friendly down-proof fabric using recycled nylon yarn with a deformed cross section is provided, characterized in that +1 to 5% is set, processed at 180 to 190 ° C, 30 to 60 m / min, and then subjected to high-temperature thermal calender processing. .

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

In the method of manufacturing an eco-friendly down-proof fabric using recycled nylon yarn of the present invention, Y-shaped or cross-shaped recycled nylon yarn is used as a yarn, and after sizing the warp yarn, weaving, pretreatment, scouring, and dyeing After doing, it is performed in the order of post-processing and high-temperature thermal calendering.

Since the existing down-proof material is manufactured by the resin coating method, the problem of environmental pollution caused by solvent and harmfulness of the product to the human body has always existed. Therefore, in the present invention, Y-shaped or cross-shaped cross-section recycled nylon yarn with excellent covering properties was used to make it suitable as a non-coating down-proof material, and it contained 0.5 to 1.5% by weight of a high-concentration silicone tear enhancer during processing. It can fundamentally solve the problem caused by the emission of harmful substances and environmental problems by treating it with a post-treatment liquid to improve the high gloss and tissue filling using the heat calender in the post-process and to give the down-proof property.

The Y-shaped or cross-shaped cross-section recycled nylon yarn has a wide surface area to maximize down-proof properties, and the cross-sectional shape is complex yet has good package properties, making it difficult for hard keratin of the down material to escape between the fibers. . In addition, the higher the heat shrinkage rate of the yarn, the higher the down-proof property is expected because the yarn shrinks more during scouring. The heat shrinkage rate of Y-shaped or cross-shaped cross-section recycled nylon yarn is preferably 10 to 13%.

The Y-shaped or cross-shaped recycled nylon yarn for use as a ramp undergoes a sizing process. Since the Y-shaped or cross-shaped recycled nylon yarn has a slightly lower tensile strength than the conventionally used special-shaped cross-section yarn, trimming and production when weaving high-density fabrics There may be a problem with speed, so it is preferable to weave using a water jet loom.

In the sizing process of the present invention, a sizing solution containing 30 to 70% by weight of acrylic acid, 1 to 3% by weight of an antistatic agent, 0.01 to 0.5% by weight of a penetrant, 5 to 10% by weight of wax and water as the balance is used for water jet looms. Slope sizing is preferred.

The padding is dried at a coating rate of 6 to 12% in the sizing liquid to improve the abrasion resistance of the yarn, prevent thread breakage, and reduce static electricity while protecting the surface of the warp yarn.

After the sizing process, a weaving process is performed. The warp density is 179 to 185 yarns/inch with 20 denier standard warp and weft yarns, and the weft density is 185 to 190 yarns/inch, and the fabric weight is 33 to 38 g/sqm, cover factor Weave to be 18.0 ~ 18.5.

It was confirmed that the downproof property deteriorates when the warp density is less than 179 yarns/inch and the weft density is less than 185 yarns/inch. If the warp density exceeds 185 yarns/inch and the weft density exceeds 190 yarns/inch, friction lines may occur.

Since air resistance and low fineness due to the Y-shaped or cross-shaped cross section of the weft yarn of the present invention may cause delivery pressure defects, it should be noted that pin yarn and weft yarn sagging accidents occur frequently during air jet weaving.

A pre-treatment step is performed to improve the whiteness of the fabric by treating the woven fabric in a pre-treatment liquid. The pretreatment process includes NaOH 30 ~ 100g / ℓ, alkaline penetrating agent 5 ~ 10g / ℓ, oxidizing desizing agent 10 ~ 15g / ℓ, refining agent 5 ~ 10g / ℓ, deoiling agent 5 ~ 10g / ℓ and water as the balance. Treatment with liquid is particularly preferred for improving whiteness.

After scouring and dyeing, whiteness was excellently expressed under the scouring condition of 85~90℃, and the longer the scouring time, the lower the whiteness by about 2.5. It is preferable in terms of the efficiency of the pretreatment process. Dyeing is carried out by the usual dyeing method of nylon fabric.

After dyeing, post-processing is performed. In the case of medium-dark colors, post-processing may be performed after processing 1-3% of a fixing agent at 70-80 ° C to improve wet fastness. The post-treatment process includes 5 to 10% by weight of a polyurethane-based fluorine-free water repellent, 1 to 3% by weight of a crosslinking agent, 0.1 to 0.5% by weight of citric acid, 0.5 to 1.5% by weight of a high-concentration silicone-based tear enhancer of 60 to 90%, and water as the balance. It is treated in a post-treatment liquid containing The high-concentration silicone-based tear enhancer makes tissue smoothness excellent, can reduce the DOWN PROOF enhancement effect and crease mark phenomenon, and can express excellent tear strength. If it is less than 0.5% by weight, it is difficult to express the above effect, and if it exceeds 1.5% by weight, the softness and slipperiness of the surface are too increased, making it unsuitable as a padding material.

Then, check the overall width and weft density of the dyed paper, widen the dyed paper by +0.5~1", set the overfeed by +1~5% using the process overfeed device in the tenter machine, and set the temperature at 180~190℃, Dry it by treating it at 30~60m/min.

Thereafter, high-temperature thermal calender processing is performed, which is an essential process for manufacturing high-density fabrics with excellent down-proof properties by minimizing air gaps in the fabric. /min, processing 4 to 5 times at 160 ~ 185 ℃ and 1 to 2 times at 60 ~ 120 ℃ restores curability due to high-temperature dry processing and improves tissue smoothness due to the high-concentration silicone-based tear enhancer present in the post-treatment liquid As it is excellent, it can reduce the effect of enhancing DOWN PROOF and the crease mark phenomenon, and it is possible to express excellent tear strength. However, if the number of thermal calendar processing exceeds 7 times, the tear strength may rather decrease.

In other words, before thermal calender processing, the processing paper standard compared to the dyeing paper standard must be finalized and followed. After the first thermal calendar, the overall width must be checked and the difference in shrinkage rate between the front and rear should be managed to be -3% or less. If it exceeds -3.5%, frictional lines and creases due to water supply and shrinkage occur, which do not disappear even after the additional heat calendering process, resulting in poor appearance of the product.

Conventional wet-drying thermal calendering can also be implemented, but it has been confirmed that the Hi Grossy gloss of the surface is degraded and the quality is deteriorated due to irregularities on the surface. There is a possibility of generating static electricity, so a humidifier spray device and an ionizer must be additionally installed, and the Hi Grossy effect and air permeability of 0.2 ~ 0.8 CFM and DOWN PROOF are maintained on the surface of the product that has completed the normal thermal calendar process. product production is possible.

The present invention can solve the problem of DOWN rotting due to the lack of air permeability of the existing DOWN PROOF coated fabric, reverse engineering the processing specifications during weaving, and design the final thermal calendar processed paper within ±2% of the warp density and weft density difference. Gaps generated at the intersection of warp and weft yarns form a square shape, and a high-concentration silicone-based tear enhancer is evenly distributed in the processing padding to fill the tissue due to the thermal shrinkage behavior of silicon during the high-temperature thermal calendering process. It is possible to manufacture a HIGH GROSSY DOWN PROOF fabric having a high-temperature thermal calender surface as a surface while maintaining air permeability. In addition, since there is no chemical substance applied during post-processing, there is almost no increase or decrease in weight, and as a pure outer material, heat retention is maintained and managed, and by using a thermal calendar glossy surface, high-visibility, high-color Down proof padding fabrics are available.

1 is a product picture of Example 1, which is an eco-friendly down-proof fabric using a modified cross-section recycled nylon yarn of the present invention,
2 is a product picture of Comparative Example 1, which is a down-proof fabric manufactured using conventional general yarn;
Figure 3 is a DOWN PROOF test graph according to the number of washings of the fabrics of Example 1 and Comparative Example 1.

In the following examples, a non-limiting example of a method for manufacturing an eco-friendly down-proof fabric using the modified cross-section recycled nylon yarn of the present invention is given.

[Example 1]

40 wt% acrylic acid, 1 ^wt % antistatic agent, 0.03 wt% penetrant, 5 wt% wax After padding and drying with a sizing ratio of 8% in a sizing solution containing % and water as the balance, a sizing process is performed, and then the same nylon yarn as the warp yarn is supplied as the weft yarn, and the warp density is 180 yarns / inch using a water jet loom, It was woven to have a fabric weight of 38 g/sqm and a cover factor of 18.0 with a weft density of 185 yarns/inch plain weave.

The woven fabric is treated with a pretreatment solution containing NaOH 50g/ℓ, alkali penetrant 5g/ℓ, oxidizing desizing agent 10g/ℓ, scouring agent 5g/ℓ, oil degreaser 5g/ℓ and water as the balance to improve the whiteness of the fabric. A pre-treatment process was performed.

Thereafter, after scouring at 80 ~ 90 ° C. under conditions of atmospheric pressure for a short time, it was performed by a conventional dyeing method for nylon fabric using acid dyes.

After dyeing, it is treated with a post-treatment liquid containing 6% by weight of polyurethane-based fluorine-free water repellent, 1% by weight of crosslinking agent, 0.5% by weight of citric acid, 0.5% by weight of 80% high-concentration silicone-based tear enhancer, and water as the balance, followed by post-treatment. After doing this, check the overall width and weft density of the dyeing paper, widen the dyeing paper by +0.5 ~ 1" width, set the overfeed by +5% using the processing overfeed device in the tenter machine, 185℃, 40m /min and dried.

Thereafter, a down-proof fabric was prepared by thermal calendering at a processing speed of 30 M/min, 4 times at 180° C. and 2 times at 100° C.

[Comparative Example 1]

A down-proof fabric was prepared in the same manner as in Example 1 using Normal FDY yarn (Normal FDY 20/24 FD).

The physical properties of Example 1 and Comparative Example 1 were measured and compared in Table 1 below. As shown in FIG. 2, Example 1 (SDY 20/18 YFD) shows that the down and down permeability is very superior to Comparative Example 1 (Normal FDY 20/24 FD) as the number of washings exceeds 3 times.

performance indicator unit Example 1 Comparative Example 1 note 1. Weight g/㎡ 70 73 2. Tear strength oblique direction N 6 4 weft direction 3. Wash fastness class 4 4 4. Water fastness class 4 4 5. Sweat fastness class 3 3 6. Friction fastness case class 4 4 wet 3-4 3-4 7. Dimensional change rate (after washing 3 times) % ±3 ±4.5 8. Down proof ro 2 14 9. Air permeability cfm 0.45 0.63 10. Water repellency Early class 5(100) 5(100) 5 washes 4(90) 3(80) 11. Simpuckering class 3 3

Claims (5)

As the warp and weft yarns, Y-shaped or cross-shaped modified cross-section recycled nylon yarns are used, and after sizing the warp yarns,
The warp and weft yarns have a warp density of 179 to 185 yarns/inch and a weft density of 185 to 190 yarns/inch in a plain weave structure with a fabric weight of 33 to 75 g/sqm and a cover factor of 18.0 to 18.5 After weaving,
After the pretreatment process of improving the whiteness of the fabric by treating it with the pretreatment liquid,
After scouring and dyeing, post-processing is performed by padding in a post-treatment liquid containing 0.5 to 1.5% by weight of a high-concentration silicone tear enhancer. A method of manufacturing an eco-friendly down-proof fabric using a modified cross-section recycled nylon yarn, characterized by setting +1 to 5%, processing at 180 to 190 ° C, 30 to 60 m / min, and then processing with a high temperature thermal calender. According to claim 1,
The sizing process has a sizing rate of 6 to 12% in a sizing solution containing 30 to 70% by weight of acrylic acid, 1 to 3% by weight of an antistatic agent, 0.01 to 0.5% by weight of a penetrant, 5 to 10% by weight of wax, and water as the balance. A method for producing an eco-friendly down-proof fabric using a modified cross-section recycled nylon yarn, characterized in that padding. According to claim 1,
The pretreatment process includes NaOH 30 ~ 100g / ℓ, alkaline penetrating agent 5 ~ 10g / ℓ, oxidizing desizing agent 10 ~ 15g / ℓ, refining agent 5 ~ 10g / ℓ, deoiling agent 5 ~ 10g / ℓ and water as the balance. A method for producing an eco-friendly down-proof fabric using a modified cross-section recycled nylon yarn, characterized in that it is treated with a liquid. According to claim 1,
In the post-treatment process, the post-treatment liquid contains 5 to 10% by weight of a polyurethane-based non-fluorine water repellent, 1 to 3% by weight of a crosslinking agent, 0.1 to 0.5% by weight of citric acid, and 0.5 to 1.5% by weight of a high-concentration silicone-based tear enhancer of 60 to 90%. and a post-treatment liquid containing water as the balance. According to claim 1,
The high-temperature thermal calender processing is a molded section, characterized in that the working piston pressure is 60 ~ 100 TON, processing speed 30 ~ 40M / min, 4 ~ 5 times at 160 ~ 185 ℃, 1 ~ 2 times at 60 ~ 120 ℃ Manufacturing method of eco-friendly down-proof fabric using recycled nylon thread.