KR101151441B1 - Composite fiber, textured yarn and fabric improving acoustic absorption - Google Patents

Abstract

The present invention is a composite fiber consisting of a core portion and a sheath portion, wherein the core portion is formed of one synthetic resin selected from polyamide resin, polyester resin, polyethylene resin, the sheath portion polyamide resin, poly It provides a composite fiber with improved sound-absorbing performance is formed by forming a synthetic resin and an elutable synthetic resin selected from ester resin, polyethylene resin in a weight ratio of 30:70 to 70:30.

Composite fiber, dissolution, sound absorption, synthetic resin, fabric

Description

COMPOSITE FIBER, TEXTURED YARN AND FABRIC IMPROVING ACOUSTIC ABSORPTION}

The present invention relates to a composite fiber, and more particularly, to a composite fiber and a composite fabric and fabric improved in sound absorption performance of the composite fiber and the sound absorbing performance is improved 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, although the fiber itself is adopted and used in various fields as interior and exterior materials for building, there is almost no research considering flaw besides 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.

The present invention is a composite fiber consisting of a core portion and a sheath portion, wherein the core portion is formed of one synthetic resin selected from polyamide resin, polyester resin, polyethylene resin, the sheath portion polyamide resin, poly It provides a composite fiber improved sound-absorbing performance, characterized in that the synthetic resin and the elutable synthetic resin selected from the ester resin, polyethylene resin is formed in a weight ratio of 30:70 to 70:30.

In addition, the elutable synthetic resin isophthalic acid and bisphenol A ethylene oxide adduct; Or isophthalic acid and bisphenol S ethylene oxide adduct; provides an improved sound-absorbing composite fiber characterized in that the alkali-soluble polyester copolymerized.

In addition, the sheath portion and the core portion provides an improved sound-absorbing composite fiber, characterized in that formed in a weight ratio of 30:70 to 70:30.

In the present invention, the core portion is formed of one synthetic resin selected from polyamide resin, polyester resin, and polyethylene resin, and the sheath portion is selected from polyamide resin, polyester resin, and polyethylene resin. The synthetic fiber and the elutable synthetic resin is formed by weight ratio 30:70 to 70:30 to provide a composite fiber and improved sound absorbing performance, characterized in that the composite fiber and the general yarn is made of Interlaced or air textured yarn.

In addition, the composite fiber and the general yarn provides a composite construction improved sound absorption performance, characterized in that it is included in a weight ratio of 70: 30 to 40: 60.

In addition, the elutable synthetic resin isophthalic acid and bisphenol A ethylene oxide adduct; Or isophthalic acid and bisphenol S ethylene oxide adducts; provides an improved sound absorption performance composite composite, characterized in that the alkali-soluble polyester copolymerized.

In addition, the present invention is a fabric produced by the composite fabrication, 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 It provides a fabric, characterized in that from 80 to CPI.

In addition, it provides a fabric with improved sound-absorbing performance, characterized in that the upper fabric layer is further formed on top of the intermediate pile yarn layer.

In addition, the lower fabric layer provides a sound-absorbing performance improved fabric, characterized in that formed by a low melting point yarn to improve adhesion.

In addition, the fabric layer and the intermediate pile yarn layer, or the fabric layer and the intermediate pile yarn layer provides a fabric with improved sound-absorbing performance, characterized in that formed by 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.

The terms "about "," substantially ", etc. used to the extent that they are used herein are intended to be taken to mean an approximation of, or approximation to, the numerical values of manufacturing and material tolerances inherent in the meanings mentioned, Accurate or absolute numbers are used to help prevent unauthorized exploitation by unauthorized intruders of the referenced disclosure.

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 present invention relates to a fiber having a water-absorption function by absorbing the sound as described above and a composite processing and fabric using the same.

The composite fiber having improved sound absorption performance according to the present invention is a composite fiber composed of a core part and a sheath part, and wherein the core part may be formed of a synthetic resin capable of manufacturing general synthetic fibers, such as polyamide resin, polyester resin, or polyethylene. Any of the resins may be used.

The sheath part is formed by mixing a synthetic resin and an elutable synthetic resin for producing general synthetic fibers such as polyamide resin, polyester resin, polyethylene resin, etc., by eluting the elutable synthetic resin through a weight reduction process after fabrication of the fiber to the fiber surface Countless pores and thin valves are formed.

The general synthetic resin and the elutable synthetic resin will preferably be mixed in a weight ratio of 30:70 to 70:30. If the elutable synthetic resin is mixed at less than 30% by weight, the amount of eluted resin is small, so the sound absorbing performance of the composite fiber cannot be expected. If the amount is more than 70% by weight, the amount of the eluted resin is too much to be eluted. It simply becomes thinner.

Since the elutable synthetic resin should have a molecular structure that can be easily dissolved in alkali, it is possible to use all of the elutable synthetic resins that have been developed by modifying the general polyester so that the reduction ratio is 40 times faster than the general polyester. Isophthalic acid and bisphenol A ethylene oxide adduct; Or isophthalic acid and bisphenol S ethylene oxide adduct; alkali-elutable polyesters copolymerized therewith may be used.

The core portion and the sheath portion may be formed in a weight ratio of 30:70 to 70:30. When the core portion formed of the general synthetic resin is less than 30% by weight, the physical properties such as the strength of the fiber may be significantly lowered, and thus, the fiber may be lost. When the core portion exceeds 70% by weight, the area of the sheath portion having sound absorption performance is reduced and the sound absorption performance is reduced. This becomes insignificant.

As described above, the composite fiber formed of the core part formed of general synthetic resin such as polyamide resin, polyester resin, polyethylene resin, and the sheath part containing the elutable synthetic resin is eluted through the weight loss process to elute the synthetic resin. It is possible to produce a composite fiber with improved sound absorption performance.

The weight loss process should be performed by a method suitable for the type of elutable synthetic resin, including isophthalic acid and bisphenol A ethylene oxide adduct; Or isophthalic acid and bisphenol S ethylene oxide adduct; in the case of using an alkali-soluble polyester resin copolymerized therein, an alkali solution may be used to elute the oil-soluble polyester resin to reduce the weight.

By using the composite fiber formed as described above it can be produced a composite workpiece with improved sound absorption performance.

The composite fiber is manufactured by mixing with the composite fiber and the general yarn according to the present invention may be a material selected from the group consisting of polyamide-based, polyester-based, polyethylene-based synthetic fibers and recycled fibers. Also in connection with stretching, SDY (Spin-Draw Yarn) is preferred.

The composite fiber is preferably made of Interlace yarn (ITY) or Air textured yarn (ATY), the composite fiber and the general yarn may be mixed in a weight ratio of 30: 70 to 60: 40. If the composite fiber is included in less than the above range, there is a problem in sound absorption rate, and if the above range is exceeded, there is a problem in morphological stability of the composite processing.

The composite fiber according to the present invention can be carried out a weight loss process after manufacturing the fiber, but when mixed with other fibers as described above to produce a composite process, the composite fiber is to perform a weight loss process in the dyeing step after the composite process It would be desirable for morphological stability, such as porosity of the surface and morphology of the valve.

Using the formed composite processing can be produced a fabric with improved sound absorption performance. The shape of the fabric is not limited, but a preferred structure will be described below as a non-limiting example.

Figure 2 is a perspective cross-sectional view of the 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. 4, 400), by using a low melting point yarn (LM yarn) in the lower fabric layer to increase the adhesiveness with 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, by mixing 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. 6, 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, the membrane vibration is caused by the thickness of the upper and lower fabric layers, the type and fineness of the yarn used, and the density of the tissue, and the small fiber vibration occurs in the fibers in the fabric tissue. 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.

Meanwhile, the fabric illustrated in FIG. 3 illustrates 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 piles formed in the intermediate pile yarn layer 200 in a number of intermediate pile yarn layers, and again vibrating in the lower circle monolayer. .

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 fiber according to the embodiment of the present invention has an effect of improving sound absorption due to a structure in which a plurality of pores and valves are formed on the surface, thereby greatly improving the moisture content.

In addition, in the case of manufacturing composite fabric by manufacturing the composite fiber according to the present invention, the fabric forms a pile layer including a fabric and an air layer composed of fibers, so that the sound absorption of the fabric and the sound absorption of the pile structure are doubled. There is an effect to be improved.

In addition, in the case of manufacturing the fabric of the composite fiber according to the present invention, the fabric is in particular 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 low frequency 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, when manufacturing the fabric from the composite fiber according to the present invention, the fabric can be manufactured without using an additional adhesive even when used in conjunction with the sound-absorbing performance and the sound-absorbing board is environmentally friendly, flame retardant properties can also be given sound absorption It has the advantage of being able to express complex functions such as blocking harmful substances and flame retardancy.

In addition, in the case of manufacturing the fabric from the composite fiber according to the present invention, the fabric has an advantage in that the sound absorption is doubled, especially when used in conjunction with a conventional sound absorbing board, especially in the low frequency band which is insufficient in the prior art.

In addition, when manufacturing the fabric from the composite fiber 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, the sound absorption rate when the uneven structure is expressed in the upper fabric layer This has the advantage of doubled.

Example  One

Preparation of Composite Fiber

The core portion 100% by weight polyester resin, the cis portion 50% by weight isophthalic acid and bisphenol A ethylene oxide adduct; Or isophthalic acid and bisphenol S ethylene oxide adduct; spun at 50% by weight of an alkali-soluble polyester copolymerized therein to prepare a composite fiber.

Of composite processing  Produce

70 parts by weight of the POY composite fiber and 30 parts by weight of the 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 sheath portion was 35% by weight of polyester.

Example  3

In the same manner as in Example 1, the composite fiber was 60% by weight of the composite fiber.

Example  4

In the same manner as in Example 1, in the composite processing, the proportion of the composite fiber was 50% by weight.

Example  5

In the same manner as in Example 1, the composite fiber was 40% by weight of the composite fiber.

Example  6

In the same manner as in Example 1, the composite workpiece was manufactured by Air Textured.

Example  7

As in Example 6, the sheath portion was 35% by weight of polyester.

Example  8

In the same manner as in Example 6, the composite fiber was 60% by weight of the composite fiber.

Example  9

In the same manner as in Example 6, in the composite processing, the proportion of the composite fiber was 50% by weight.

Example  10

In the same manner as in Example 6, the composite fiber was 40% by weight of the composite fiber.

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 sheath portion was 35% by weight polyester.

Example  13

In the same manner as in Example 11, the composite fiber was 60% by weight of the composite fiber.

Example  14

In the same manner as in Example 11, in the composite processing, the proportion of the composite fiber was 50% by weight.

Example  15

In the same manner as in Example 11, the composite fiber was 40% by weight of the composite fiber.

Example  16

In the same manner as in Example 11, the composite workpiece was manufactured by Air Textured.

Example  17

As in Example 16, the sheath portion was 35% by weight of polyester.

Example  18

In the same manner as in Example 16, the composite fiber was 60% by weight of the composite fiber.

Example  19

In the same manner as in Example 16, the composite fiber in the composite fiber was 50% by weight.

Example  20

In the same manner as in Example 16, the composite fiber was 40% by weight of the composite fiber.

Comparative example  One

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

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 instead of the composite fiber.

Comparative example  4

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

division Composite fiber Complex Processing Fabric form Sisbu Core part Composite fiber General History shape Example 1 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 1 - - - - - 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 according to each example is shown in Table 3 below.

Here, NRC (Noise Reduction Coefficient) means that the sound absorption rate of a sound absorbing material is different for each frequency, so when referring to the sound absorption characteristics of a material, a single index of sound absorption representative of the material is needed. 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 0.07 0.11 0.13 0.19 0.125 Example 2 0.05 0.10 0.11 0.13 0.0975 Example 3 0.08 0.11 0.12 0.16 0.1175 Example 4 0.07 0.09 0.11 0.15 0.105 Example 5 0.06 0.09 0.09 0.14 0.095 Example 6 0.08 0.12 0.14 0.18 0.130 Example 7 0.06 0.12 0.12 0.15 0.1125 Example 8 0.07 0.10 0.12 0.16 0.1125 Example 9 0.07 0.09 0.11 0.15 0.105 Example 10 0.07 0.08 0.10 0.14 0.0975 Example 11 0.08 0.10 0.12 0.16 0.115 Example 12 0.05 0.09 0.09 0.13 0.090 Example 13 0.07 0.09 0.11 0.15 0.105 Example 14 0.06 0.08 0.11 0.13 0.095 Example 15 0.05 0.07 0.09 0.14 0.0875 Example 16 0.06 0.10 0.12 0.15 0.1075 Example 17 0.04 0.08 0.09 0.12 0.0825 Example 18 0.07 0.09 0.10 0.14 0.010 Example 19 0.06 0.08 0.10 0.14 0.095 Example 20 0.05 0.07 0.09 0.14 0.0875 Comparative Example 1 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, sound absorption was improved when using the composite fiber of the present invention. However, there was a difference in the sound absorption performance according to the ratio of the sheath portion of the composite fiber, but the type of composite processing is not significantly different. In addition, in the case of using the composite fiber, the sound absorbing performance for the low frequency sound, which is pointed out as a disadvantage of the artboard sound absorbing performance, in particular, shows a significant improvement.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the inventions. It will be clear to those who have knowledge of.

1 is a view showing before and after the process of weight loss of the composite fiber according to the present invention.

2 and 3 is a perspective cross-sectional view of a fabric made of a processed yarn according to an embodiment of the present invention.

4 to 6 is a state in which the fabric and the sound-absorbing board is made of a processed yarn according to an embodiment of the present invention.

DESCRIPTION OF THE RELATED ART [0002]

100: lower fabric layer 200: intermediate pile yarn layer

300: upper fabric layer 400: sound absorption board

500: irregularities

Claims (10)

In the composite fiber consisting of a core portion and a sheath portion, The core part is formed of one synthetic resin selected from polyamide resin, polyester resin, polyethylene resin, The sheath portion is a synthetic resin and isophthalic acid and bisphenol A ethylene oxide adduct selected from one of polyamide resin, polyester resin and polyethylene resin; Or isophthalic acid and bisphenol S ethylene oxide adduct; the elutable synthetic resin of the alkali-elutable polyester to be copolymerized is formed in a weight ratio of 30:70 to 70:30, Sound absorbing performance-improved composite fiber, characterized in that the eluted synthetic resin is prepared by eluting in a weight loss process. The core portion is formed of one synthetic resin selected from polyamide resin, polyester resin, and polyethylene resin, and the cis portion is one synthetic resin selected from polyamide resin, polyester resin, and polyethylene resin, isophthalic acid, and the like. Bisphenol A ethylene oxide adduct; Or isophthalic acid and bisphenol S ethylene oxide adduct; a composite fiber produced by dissolving an elutable synthetic resin of an alkali-elutable polyester to be copolymerized in a weight ratio of 30:70 to 70:30 and eluting an elutable synthetic resin by a weight loss process; Composite processing with improved sound-absorbing performance, characterized in that the general yarn is mixed with an interlaced yarn (ITY) or air textured yarn (ATY). As a fabric produced by the composite processing of claim 2, 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 characterized in that the 20 to 80 CPI. delete delete delete delete delete delete delete

Images