KR20090103166A - Preparing of textured yarn improving acoustic absorption - Google Patents

Abstract

PURPOSE: A manufacturing method of composite textured yarn having improved absorption coefficient is provided to solve a problem related to deterioration of a hollow rate due to heat during a weaving and a dyeing processes. CONSTITUTION: A manufacturing method of composite textured yarn having improved absorption coefficient includes a step for manufacturing hollow fiber and general fiber to interlace yarn or air textured yarn. A hollow ratio of the hollow fiber is 35 ~ 50%. The hollow fiber and the general fiber are included to the yarn with a ratio of 70 : 30 ~ 40 : 60. The hollow fiber is comprised of an elution compound part and a SIS component part. The elution compound part is alkali easy rendering polyester. The SIS component part includes a SIS component of 98 ~ 99 weight% and the elution compound part of 1 ~ 2 weight%.

Description

Manufacturing method of composite workpiece with improved sound absorption performance {PREPARING OF TEXTURED YARN IMPROVING ACOUSTIC ABSORPTION}

The present invention relates to a method for manufacturing a composite workpiece, and more particularly, to a method for manufacturing a composite workpiece having improved sound absorption by increasing the air content.

With the development of technology and the growth of industry, the densification of building space has been achieved, and the sources of noise have been increasing due to the expansion of transportation facilities and production facilities. Moreover, the noise problem is regarded as an important environmental problem in an assembly building such as an apartment. In addition, as environmental hormones, sick house syndrome, and atopic dermatitis emerge as environmental issues, the interest and importance of environmentally friendly home interior materials are getting stronger day by day. In building interior materials, flame retardancy is recognized as a necessity, not an option.

As such, the demand for sound absorption, eco-friendliness, and flame retardancy is increasing in the market and policy of home interior materials, but development of high functional building interior materials considering all of them is insufficient.

In particular, the fiber itself is adopted and used in various fields as interior and exterior materials for building, but almost no research considering flaw in addition to the decorative function. However, in the development of Hum-eup materials using fibers, the field of application is only introduced as a component that forms part of the sound-absorbing material as a fiber assembly (nonwoven fabric, foam, etc.).

As an example, techniques using artboards, wood boards (MDF), glass fibers, minerals and polyurethane foams have been disclosed, particularly with regard to flaws. First of all, art boards are manufactured by thermo-compressing polyester and have the advantage of being recyclable and easy to incinerate, but have a disadvantage of poor low frequency absorption characteristics. In the case of wooden boards, the wood fiber is molded by heating and pressing with a synthetic resin adhesive, which cannot be recycled, and has a drawback of poor suction rate. In addition, in the case of the interior material made of glass fiber, mineral material, polyurethane foam, the sound absorption rate has a good advantage, but all are difficult to recycle and have the disadvantages of harmful components to human body (see Table 1).

Korean Patent Laid-Open Publication No. 2006-8239 as the polyester sound absorbing board, in the polyester sound absorbing board, high melting point polyester staple fiber 60 to 80% by weight, low melting point polyester staple fiber and polypropylene staple fiber 20 to 40% by weight A polyester sound-absorbing board with UV printing finish has been proposed for a board made by heat-sealing a nonwoven fabric having a density of 0.2-0.4 g / cm3 after uniformly blending through other surface and needle punching processes.

In addition, Korean Patent Publication No. 1999-81620 discloses 80 to 90 parts by weight of high paper pulp, 8 to 20 parts by weight of boric acid, 2 to 15 parts by weight of borax, and 3 to 20 parts by weight of aluminum sulfate with respect to 100 parts by weight of solids. A sound absorbing board composed of a water-soluble resin adhesive such as acrylic resin or vinyl acetate based on 3 to 30 parts by weight based on the solid content mixture and 100 parts by weight of the solid content has been proposed.

In addition, as a sound absorbing board using glass fiber, glass fiber fabric and nonwoven fabric are attached to both sides of the needle mat obtained by needle punching long glass fiber of proper thickness in Korean Utility Model No. 1998-68556. A sound absorbing board for building has been proposed.

As the sound absorbing board for building interior use as described above, porous sound absorbing materials such as synthetic fiber, wood fiber, glass fiber, mineral board, and polymer foam board are mainly proposed. Thus, only the technology in which the fiber assembly is used as a component of the sound absorbing material is considered, not the material itself.

Therefore, in order to improve sound absorbency, the sound absorbing improvement of the fiber itself, which is a basic material of the fiber aggregate, which is a component of the sound absorbing material, should be considered, and a study considering such factors is desired.

In order to solve the above problems, an object of the present invention is to provide a method for manufacturing a composite workpiece with improved sound absorption.

In addition, another object of the present invention is to provide a method for manufacturing a composite workpiece having excellent sound absorption and workability.

It is another object of the present invention to provide a sound absorbing material using a yarn manufactured through the manufacturing method of the composite workpiece.

In order to achieve the above object, in the manufacturing method of composite processing, hollow fiber and general yarn are manufactured by Interlaced or air textured yarn, and the hollow yarn has a hollow ratio of 35 to 50%. To provide.

In another aspect, the present invention provides a method for producing a composite fiber improved sound absorption performance, characterized in that the hollow fiber and the general yarn is included in a weight ratio of 70: 30 to 40: 60.

In another aspect, the present invention provides a method for producing a composite fiber improved sound-absorbing performance of the hollow fiber composed of the eluting component portion and the cis component portion is an alkali-elutable polyester copolymerized isophthalic acid and bisphenol A or S ethylene oxide adducts. do.

In another aspect, the present invention is the hollow fiber is composed of the eluting component part and the cis component part, the sheath component part is 98 to 99% by weight, the elution component part of the composite component of the improved sound absorption performance is mixed at a ratio of 1 to 2% by weight Provide a method.

In another aspect, the present invention is a fabric produced by the method, the intermediate pile yarn layer formed of a pile is formed on the lower fabric layer, the thickness of the fabric is 1 to 50mm, the density of the intermediate pile yarn layer is 20 to 80 CPI Providing phosphorous fabric.

In another aspect, the present invention provides a fabric formed with an upper fabric layer on top of the intermediate pile yarn layer.

In another aspect, the present invention provides a fabric formed of a low melting point yarn to improve the adhesion of the lower fabric layer.

The present invention also provides the fabric layer and the intermediate pile yarn layer, or the fabric layer and the intermediate pile yarn layer formed of flame retardant yarn.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. First of all, it should be noted that in the drawings, the same components or parts denote the same reference numerals as much as possible. In describing the present invention, detailed descriptions of related well-known functions or configurations are omitted in order not to obscure the subject matter of the present invention.

As used herein, the terms "about", "substantially", and the like, are used at, or in close proximity to, numerical values when manufacturing and material tolerances inherent in the meanings indicated are intended to aid the understanding of the invention. Accurate or absolute figures are used to assist in the prevention of unfair use by unscrupulous infringers.

As used herein, the term "fabric" is used to include all articles, nonwoven fabrics and fibrous webs produced by weaving or knitting.

Acoustic absorption refers to sound that is projected on one side of a material and is not reflected when viewed only from that side. Therefore, this is called sound absorption, and the energy ratio of the sound which is not reflected with respect to the energy of the incident sound is called sound absorption rate.

The noise that can be generated in the indoor space can be classified into solid transmission sound and air transmission sound generated by solid materials such as concrete and wood, which constitute the interior.The sound absorption rate is the frequency, incident angle, material material, thickness, It may differ depending on the installation method and the situation behind it.

The energy of sound incident on a material is partially reflected at the surface and partially transmitted, and the rest is absorbed in the material. Sound absorption inside the material is ① in porous materials, friction, viscous resistance or vibration of small fibers in the inside of the material, and ② in the case of thin plates or cloths, membrane vibration. ), ③ In the case of a jar with a narrow opening, it occurs because sound loses energy due to resonance.

Therefore, the processed yarn according to the present invention intends to realize the above structure. The processed yarn according to the present invention may be in the form of a composite hollow-dissolved hollow fiber and general yarn.

The eluted hollow fiber is preferably 35 to 50% of the hollow ratio, and the material may be one or more selected from the group consisting of polyamide-based, polyester-based, polyethylene-based synthetic fibers and regenerated fibers. POY is also preferred with regard to stretching.

If the hollow ratio is less than the above range, there is a problem that the sound absorption performance is lowered, and if the hollow ratio is more than the above range, the dissolution rate is increased, which causes problems in form stability and productivity of the yarn.

In the processed yarn of the present invention, it is preferable to use an elution type using hollow fiber. In general, hollow yarns are not suitable as sound-absorbing materials due to their low moisture content at the hollow rate of less than 25%, and the specific gravity of the yarn itself is relatively low due to the presence of hollows. The phenomenon that the specific gravity is lowered is that when manufacturing a processed yarn, for example, ITY or ATY, the frequency of interlacing the filaments of yarns according to the air pressure is low, so the interlace efficiency is low in the case of ITY, and the uniformity of the loop in the case of ATY. Degradation problems have been found.

On the other hand, the eluted hollow yarn has an advantage that the hollow ratio is larger than that of the general hollow fiber, so that the content rate can be improved. Since the hollow core is not hollow at the stage of manufacturing ITY or ATY, interlaced or looped by air entrainment There is no disruption in expression. In addition, for the fabric produced using the processing machine according to the present invention, if the weight loss during the post-processing process, in particular during the dyeing step, the core portion to form a hollow through the fiber cross-section and side to elute to form a hollow shape ITY or ATY Even during the manufacturing step, weaving, dyeing step there is no disadvantage that the hollow ratio is lowered due to various thermal history. Therefore, in the processed yarn according to the present invention, the hollow yarn is preferably used in the elution type.

In the eluted hollow fiber, the content of the eluting component and the cis component may be determined according to the above-mentioned hollow ratios, and the component forming the elutable component may be a polymer used, and as a non-limiting example, the core component is isophthalic acid. And alkali soluble polyesters in which bisphenol A or S ethylene oxide adducts are copolymerized. In addition, the components forming the cis component portion may be included alone, such as polyamide, polyester, polyethylene, etc., 98 to 99% by weight of the component for the surface bulkiness of the hollow fiber, 2 to eluting component part component It may be in a mixed form at 1% by weight.

Such eluted hollow yarns form a processed yarn together with a normal yarn.

The general yarn constituting the processed yarn according to the present invention may be one or more selected from the group consisting of polyamide-based, polyester-based, polyethylene-based synthetic fibers and regenerated fibers. SDY is also preferred with regard to stretching.

When the processed yarn is an interlaced yarn or an air textured yarn, the core portion may be formed of a general yarn, and the effect portion may be formed of hollow fiber. At this time, the general yarn and the hollow yarn may be included in a weight ratio of 30: 70 to 60: 40. If the hollow fiber is included in less than the above range, there is a problem in the sound absorption rate, and if it exceeds the above range, there is a problem in the form stability of the processed yarn.

Fabric can be manufactured using the formed yarn. The shape of the fabric is not limited, but a preferred structure will be described below as a non-limiting example.

1 is a perspective cross-sectional view of a fabric according to an embodiment of the present invention, the fabric may be formed of a lower fabric layer 100, intermediate pile yarn layer 200, the upper fabric layer 300.

The lower fabric layer 100 may give various design patterns such as plain weave or honeycomb shape, and may be manufactured by mixing natural fibers such as cotton, wool, silk, hemp, other synthetic fibers alone, or two or more fibers. In addition, high shrink yarns and porous yarns (absorbent quick-drying yarns) can be used as yarns.

In particular, when the lower fabric layer 100 is applied to the sound insulation module to be combined with the building sound absorbing board (see Fig. 3, 400), by using a low melting point yarn (LM yarn) in the lower fabric layer to increase the adhesion to the sound absorbing board When bonding the sound-absorbing board layer and the structure by thermal bonding without using an adhesive, it is possible to improve the VOC problem by using the adhesive.

Meanwhile, the intermediate pile yarn layer 200 connecting the lower fabric layer 100 and the upper fabric layer 300 contains an upright pile yarn column and an air layer, monofilament, multifilament, multifilament processed yarn, spun yarn, latent wound yarn, porous yarn, It can be selectively used in hollow fiber, etc., the length of the intermediate pile yarn layer (1 ~ 50mm) and the pile yarn density can be adjusted in various ways. The type, fineness, density, and length of the pile yarn have a great influence on the shock absorbing function (cushionability) and sound absorption performance, and by varying them, the shock absorbency and sound absorption can be adjusted to a desired level.

The upper fabric layer 300 can be given a variety of design patterns, such as plain weave or honeycomb like the lower fabric layer, and mixed with natural fibers such as cotton, wool, silk, hemp, other synthetic fibers alone, or two or more fibers. Can be prepared. In addition, the upper fabric layer can add various design processing and functional processing for wallpaper use through etching processing, printing processing, coating processing, and the like. Specifically, it is possible to impart functionality through antibacterial deodorization processing, flame retardant processing, antifouling processing. In addition, the function can also be expressed by using a yarn mixed type (composite fiber) yarn containing the functional material.

On the other hand, the surface of the upper fabric layer may implement a three-dimensional shape 500 of various forms. As shown in FIG. 5, the surface shape of the upper fabric layer can express various three-dimensional feelings such as round, orthogonal, honeycomb, comb, emboss, etc. When the surface of the upper fabric layer is formed with an uneven structure, the diffraction distance is further increased. It is possible to implement the effect of improving the sound absorption performance by lengthening. In the present invention, the surface deformation of the upper fabric layer can be formed simultaneously with the formation of the fabric layer during weaving or knitting without a separate additional process.

In the present embodiment, the thickness of the entire structure is preferably about 1 to 50mm, the sound absorbing performance is significantly lowered if it is less than the above range, the sound absorbing performance is improved if it exceeds the above range, but the self-weight of the intermediate pile Excessive loads supporting the upper and lower fabric layers may cause problems in shape stability. On the other hand, the density of the intermediate pile layer can be expressed by CPI (Course Per Inch), 20 to 80 CPI is appropriate, preferably about 30 to 50. It is because the density of the pile yarn is less than the above range, so that the sound absorbing performance is lowered and the shape stability also occurs. When the pile yarn is exceeded, the diffraction phenomenon between the pile yarns is expected to be lowered.

The fabric according to the present invention can be produced by various methods. In the knitting method, single circular letters, double-sided circular letters, tricot warp letters, raschel letters, double raschel letters, multi-woven fabrics, laminated nonwoven fabrics and the like can be used.

Referring to the sound absorption mechanism of the original fabric in the present invention, the sound wave generated in the room first passes through the intermediate pile yarn layer 200 located between the upper fabric layer 300 and the lower fabric layer 100 to improve the sound absorption effect in the low frequency region.

In more detail, membrane vibrations are caused by varying the thickness of the upper and lower fabric layers, the type and fineness of the yarns used, and the density of the tissues, and the fibers in the fabric tissues generate small fiber vibrations. On the other hand, the intermediate pile layer contains pile pillars and air layers that are erected by varying the type, fineness, density, and length of the pile yarn, making the greatest contribution to the shock absorption and sound absorption performance. Also, the sound waves transmitted through the upper fabric layer are diffracted between the pile yarns, and the energy thereof is significantly reduced.

On the other hand, the fabric shown in Figure 2 shows a fabric according to another embodiment of the present invention. In the present exemplary embodiment, the intermediate pile yarn layer 200 may be formed on the lower fabric layer 100 without the upper fabric layer 300. In this embodiment, the lower fabric layer and the intermediate pile yarn layer may be woven in the same material and manner as the above embodiment, and may also be manufactured by other tufting methods. In this case, the thickness of the fabric is preferably about 1.2 to 4 mm, which is the same reason as the above embodiment.

On the other hand, the sound absorbing mechanism in the present embodiment is a structure in which a sound absorbing effect can be expressed by diffracting or vibrating between the piles formed in the intermediate pile yarn layer 200 in a number of intermediate pile yarn layer and then vibrating in the lower fabric layer. .

When the fabric is formed as described above to form a hollow in the processed yarn according to the present invention through a weight reduction process and a neutralization process. (Elution step) The elution step can be carried out separately or integrally with post-processing step such as dyeing step to improve productivity. Can contribute to

As described above, the composite work according to the embodiment of the present invention has an effect of improving sound absorption performance due to the structure of which the hollow fiber hollow work is formed and the moisture content is greatly improved.

In addition, the processed yarn according to the present invention solved the problem that the hollow ratio is reduced by the heat history generated during the weaving, dyeing process by forming a hollow after manufacturing the fabric using the processed yarn.

In addition, when the fabric is manufactured by the processed yarn according to the present invention, the fabric is formed by the pile layer including the fabric and the air layer made of fibers, the sound absorption of the fabric and the sound absorption of the pile structure has an effect that the sound absorption performance is improved.

In addition, in the case of manufacturing the fabric by the processed yarn according to the present invention, the fabric is particularly low frequency by grafting the fabric having the intermediate pile layer of the present invention to the building sound absorbing board made of polymer foam, glass fiber, mineral fiber, wood fiber, polymer fiber, etc. Sound absorption and sound insulation in the band is shown to be excellent, as well as can be applied to the sound absorption module that can impart shock absorbency for human safety.

In addition, in the case of manufacturing the fabric by the processed yarn according to the present invention, the fabric can be manufactured without using a separate adhesive even when used in conjunction with the sound absorbing performance and the sound absorbing board, it is environmentally friendly, it is possible to impart flame retardant properties It has the advantage of being able to express complex functions such as blocking harmful substances and flame retardancy.

In addition, when the fabric is manufactured by the processed yarn according to the present invention, when the fabric is used in conjunction with a conventional sound absorbing board, in particular, the sound absorption rate is doubled, and in particular, the sound absorption rate in the low frequency band which is insufficient in the prior art has an advantage.

In addition, when manufacturing the fabric by the processed yarn according to the present invention, the fabric is possible to implement a variety of patterns and three-dimensional shape on the upper fabric layer without additional processing, for example, if the uneven structure is expressed in the upper fabric layer sound absorption rate There is a doubled advantage.

In addition, when manufacturing the fabric with a processed yarn according to the present invention, the fabric provides a fabric with improved sound absorption rate by suggesting the optimal conditions (thickness, density, fiber material and fabric structure) required for sound absorption as a structure.

1 and 2 is a perspective cross-sectional view of a fabric made of a processed yarn according to an embodiment of the present invention.

3 to 5 is a state in which the fabric and the sound absorbing board made of a processed yarn according to an embodiment of the present invention.

Figure 6 is a manufacturing process of forming a hollow portion according to an embodiment of the present invention.

<Description of Major Symbols in Drawing>

100: lower fabric layer 200: intermediate pile yarn layer

300: upper fabric layer 400: sound absorption board

500: irregularities

Example  One

Manufacture of hollow yarns

The sheath component part was spun into 50% by weight of polyester, and the eluted component part was spun into 50% by weight of an alkali-elutable polyester copolymerized with isophthalic acid and bisphenol A or S ethylene oxide adduct.

Of composite processing  Produce

70 parts by weight of POY hollow fiber and 30 parts by weight of SDY general polyester yarn were manufactured by Interlace.

Fabrication

The upper and lower fabric layers were formed of 100D / 36F yarns, and the intermediate pile layer was formed of 30D / 1F yarns. At this time, the entire fabric was 3.32mm thick and the pile yarn was woven at 47 CPI (course per inch) (hereinafter referred to as 'type A').

Elution

After treatment for 60 minutes at 95 ℃ with NaOH for weight loss was treated with the fabric for 5 minutes at about 80 ℃ with CH ₃ COOH.

Example  2

In the same manner as in Example 1, the cis component was 35 wt% polyester.

Example  3

In the same manner as in Example 1, the ratio of the hollow fiber in the processed yarn was 60% by weight.

Example  4

In the same manner as in Example 1, the ratio of the hollow fiber in the processed yarn was 50% by weight.

Example  5

In the same manner as in Example 1, the ratio of the hollow fiber in the processed yarn was 40% by weight.

Example  6

In the same manner as in Example 1, the processed yarn was manufactured by air textured yarn.

Example  7

In the same manner as in Example 6, the cis component was 35 wt% polyester.

Example  8

In the same manner as in Example 6, the ratio of the hollow fiber in the processed yarn was 60% by weight.

Example  9

In the same manner as in Example 6, the ratio of the hollow fiber in the processed yarn was 50% by weight.

Example  10

In the same manner as in Example 6, the ratio of the hollow fiber in the processed yarn was 40% by weight.

Example  11

As in Example 1, but in forming the fabric, the lower fabric layer was formed of 100D / 48F yarn, the intermediate pile layer was formed of 75D / 144F yarn. At this time, the thickness of the entire fabric was 2.00 mm, and the pile yarn was woven at 45 CPI (course per inch) (hereinafter referred to as 'type B').

Example  12

As in Example 11, the cis component was 35% by weight polyester.

Example  13

In the same manner as in Example 11, the ratio of the hollow fiber in the processed yarn was 60% by weight.

Example  14

In the same manner as in Example 11, the ratio of the hollow fiber in the processed yarn was 50% by weight.

Example  15

In the same manner as in Example 11, the ratio of the hollow fiber in the processed yarn was 40% by weight.

Example  16

In the same manner as in Example 11, a processed yarn was manufactured from an air textured yarn.

Example  17

As in Example 16, the cis component was 35% by weight of polyester.

Example  18

In the same manner as in Example 16, the ratio of the hollow fiber in the processed yarn was 60% by weight.

Example  19

In the same manner as in Example 16, the ratio of the hollow fiber in the processed yarn was 50% by weight.

Example  20

In the same manner as in Example 16, the ratio of the hollow fiber in the processed yarn was 40% by weight.

Comparative example  One

In the same manner as in Example 1, a fabric was prepared using a general polyester yarn.

Comparative example  2

Same as Comparative Example 1, but the fabric was woven into the B form.

Comparative example  3

In the same manner as in Example 1, a fabric was prepared using ordinary polyester hollow fiber.

Comparative example  4

Same as Comparative Example 3, but the fabric was woven into the B form.

division Hollow fiber Processor Fabric form Sisbu Elution Hollow fiber General History shape Example  One 50 50 70 30 ITY A Example  2 35 65 70 30 ITY A Example  3 50 50 60 40 ITY A Example  4 50 50 50 50 ITY A Example  5 50 50 40 60 ITY A Example  6 50 50 70 30 ATY A Example  7 35 65 70 30 ATY A Example  8 50 50 60 40 ATY A Example  9 50 50 50 50 ATY A Example  10 50 50 40 60 ATY A Example  11 50 50 70 30 ITY B Example  12 35 65 70 30 ITY B Example  13 50 50 60 40 ITY B Example  14 50 50 50 50 ITY B Example  15 50 50 40 60 ITY B Example  16 50 50 70 30 ATY B Example  17 35 65 70 30 ATY B Example  18 50 50 60 40 ATY B Example  19 50 50 50 50 ATY B Example  20 50 50 40 60 ATY B Comparative example  One - - - - - A Comparative example  2 - - - - - B Comparative example  3 General Hollow Fiber - - - A Comparative example  4 General Hollow Fiber - - - B

I. Test Methods

1. Test method

Jurisdiction (ISO 10354-1),

2. Measuring equipment (equipment name: model name (manufacturer / manufacturer))

In-house method: HM-02 I / O (Scein / S.KOREA)

3. Measurement temperature / humidity: (19.4 ± 0.3) ℃ / (59.4 ± 1.9)% R.H.

As a result of the test method, the sound absorption rate of each example is shown in Tables 3 and 4 below. 4A to 4B show sound absorption rates according to frequency bands of respective examples and comparative examples.

Here, NRC (Noise Reduction Coefficient) means that the sound absorption rate of a sound absorbing material is different for each frequency. Therefore, when referring to the sound absorption characteristics of a material, a single index of sound absorption representative of the material is required. It is called NRC.

NRC = (a250 + a500 + a1,000 + a2,000) / 4

Where a250: 250Hz

a500: sound absorption rate of 500Hz

a1,000: sound absorption rate of 1000Hz

a2,000: sound absorption rate of 2000Hz

frequency 250 500 1000 2000 NRC Example 1 0.08 0.11 0.12 0.17 0.12 Example 2 0.05 0.09 0.09 0.14 0.0925 Example 3 0.08 0.1 0.11 0.16 0.1125 Example 4 0.07 0.09 0.1 0.15 0.1025 Example 5 0.07 0.08 0.09 0.14 0.095 Example 6 0.08 0.12 0.12 0.17 0.1225 Example 7 0.05 0.11 0.09 0.14 0.0975 Example 8 0.08 0.1 0.11 0.16 0.1125 Example 9 0.07 0.09 0.1 0.15 0.1025 Example 10 0.07 0.08 0.09 0.14 0.095 Example 11 0.07 0.1 0.11 0.15 0.1075 Example 12 0.04 0.09 0.08 0.12 0.0825 Example 13 0.07 0.08 0.1 0.14 0.0975 Example 14 0.06 0.08 0.1 0.13 0.0925 Example 15 0.05 0.07 0.08 0.14 0.085 Example 16 0.07 0.09 0.11 0.15 0.105 Example 17 0.04 0.08 0.08 0.12 0.08 Example 18 0.07 0.07 0.1 0.14 0.095 Example 19 0.06 0.07 0.1 0.13 0.09 Example 20 0.05 0.07 0.08 0.14 0.085 Comparative example  One 0 0.01 0.02 0.03 0.015 Comparative example  2 0 0.01 0.02 0.03 0.015 Comparative example  3 0 0.01 0.02 0.04 0.0175 Comparative example  4 0 0.01 0.02 0.04 0.0175

As a result of the test results, when using the processed yarn according to the present invention, sound absorption was improved. However, there was a difference in the sound absorption performance according to the content ratio of hollow fiber and hollow yarn, but the type of processed yarn was not significantly different. In addition, in the case of using hollow fiber, the sound absorbing performance of the low frequency sound, which is pointed out as a disadvantage of the artboard sound absorbing performance, is shown to be significantly improved.

The present invention described above is not limited to the above-described embodiment and the accompanying drawings, and various substitutions, modifications, and changes are possible within the scope without departing from the technical spirit of the present invention. It will be evident to those who have knowledge of.

Claims (8)

In the manufacturing method of composite processing, The hollow fiber and general yarn are manufactured by Interlaced or Air Textured, The hollow fiber is a hollow fiber is 35 to 50% of the composite manufacturing method improved sound absorption performance. The method of claim 1, The hollow fiber and the general yarn 70: 30 to 40: 60 method for producing a composite processing improved sound absorption performance, characterized in that included in the weight ratio. The method of claim 1, The hollow yarn comprises an eluting component part and a cis component part. The method of claim 1, The hollow yarn comprises an eluting component part and a cis component part, and the sheath component part has a sound absorbing performance of 98 to 99% by weight and an eluting component part component at a ratio of 1 to 2% by weight. A fabric produced by the method according to any one of claims 1 to 4, An intermediate pile yarn layer formed of a pile is formed on an upper portion of the lower fabric layer, The thickness of the fabric is 1 to 50mm, the density of the intermediate pile yarn layer is 20 to 80 CPI. The method of claim 5, The upper fabric layer is further formed on top of the intermediate pile yarn layer. The method of claim 5, The lower fabric layer is formed of a low melting point yarn to improve adhesion. The method of claim 6, The fabric layer and the intermediate pile yarn layer, or the fabric layer and the intermediate pile yarn layer formed of flame retardant yarn.