KR20170099276A - Sound absorbing structure and method of manufacturing the same - Google Patents

Sound absorbing structure and method of manufacturing the same Download PDF

Info

Publication number
KR20170099276A
KR20170099276A KR1020160021448A KR20160021448A KR20170099276A KR 20170099276 A KR20170099276 A KR 20170099276A KR 1020160021448 A KR1020160021448 A KR 1020160021448A KR 20160021448 A KR20160021448 A KR 20160021448A KR 20170099276 A KR20170099276 A KR 20170099276A
Authority
KR
South Korea
Prior art keywords
layer
absorbing structure
sound absorbing
base layer
microporous
Prior art date
Application number
KR1020160021448A
Other languages
Korean (ko)
Inventor
이명
정승문
Original Assignee
(주)엘지하우시스
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by (주)엘지하우시스 filed Critical (주)엘지하우시스
Priority to KR1020160021448A priority Critical patent/KR20170099276A/en
Publication of KR20170099276A publication Critical patent/KR20170099276A/en

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form
    • B32B3/10—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form characterised by a discontinuous layer, i.e. formed of separate pieces of material
    • B32B3/18—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form characterised by a discontinuous layer, i.e. formed of separate pieces of material characterised by an internal layer formed of separate pieces of material which are juxtaposed side-by-side
    • B32B3/20—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form characterised by a discontinuous layer, i.e. formed of separate pieces of material characterised by an internal layer formed of separate pieces of material which are juxtaposed side-by-side of hollow pieces, e.g. tubes; of pieces with channels or cavities
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
    • B32B5/022—Non-woven fabric
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/22—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
    • B32B5/24—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer
    • B32B5/26—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer another layer next to it also being fibrous or filamentary
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R13/00—Elements for body-finishing, identifying, or decorating; Arrangements or adaptations for advertising purposes
    • B60R13/08—Insulating elements, e.g. for sound insulation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R13/00—Elements for body-finishing, identifying, or decorating; Arrangements or adaptations for advertising purposes
    • B60R13/08—Insulating elements, e.g. for sound insulation
    • B60R13/0838—Insulating elements, e.g. for sound insulation for engine compartments
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/02—Synthetic macromolecular fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/10—Inorganic fibres
    • B32B2262/101—Glass fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2305/00—Condition, form or state of the layers or laminate
    • B32B2305/02—Cellular or porous
    • B32B2305/026—Porous
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/10—Properties of the layers or laminate having particular acoustical properties
    • B32B2307/102—Insulating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2605/00—Vehicles
    • B32B2605/08—Cars

Abstract

Disclosed are a sound absorption structure with enhanced sound absorption functions, and a production method thereof. According to the present invention, the sound absorption structure comprises: a base layer; an outer skin layer laminated on top of the base layer; and a microperforated layer disposed on top of the outer skin layer and having a plurality of holes to expose some portions of the outer skin layer.

Description

TECHNICAL FIELD [0001] The present invention relates to a sound absorbing structure,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a sound absorbing structure and a manufacturing method thereof, and more particularly, to a sound absorbing structure having improved sound absorbing performance and a manufacturing method thereof.

When driving a car, various noises are generated. The noise generated from the engine room and the noise caused by friction between the tire and the road surface are transmitted to the interior of the vehicle through the air.

Particularly, in the case of a noise source of an automobile, a noise is generated in a frequency band of 2500 Hz or less, and a porous sound absorbing material is applied to reduce the engine noise of the automobile.

However, the conventional porous sound absorbing material is effective for improving the sound absorption rate in a high frequency band of 2500 Hz or more due to the characteristics of the porous structure, but has a limitation that it can not improve the sound absorption rate in a low frequency band of less than 2500 Hz.

Therefore, in the case of the conventional porous sound-absorbing material, although there is a method of increasing the thickness in order to improve the sound absorption rate in the low frequency band, the increase in thickness causes the weight to increase, leading to a decrease in weight and thinning trend .

A related prior art document is Korean Patent Registration No. 10-1404579 (published on Jun. 11, 2014), which discloses a sound absorbing material for automobiles.

An object of the present invention is to provide a sound-absorbing structure capable of ensuring excellent sound-absorbing performance in both a high-frequency band of 2500 Hz or more and a low-frequency band of less than 2500 Hz, and a method of manufacturing the same.

According to an aspect of the present invention, there is provided a sound absorbing structure comprising: a base layer; A covering material layer laminated on the base layer; And a microporous layer disposed on the shell material layer and having a plurality of pores exposing a part of the shell material layer.

According to an aspect of the present invention, there is provided a method of manufacturing a sound absorbing structure, including: (a) forming a microporous layer having a plurality of pores on an upper surface of a shell material layer; And (b) attaching a base layer to the lower surface of the outer skin layer.

The sound absorbing structure and the method of manufacturing the same according to the present invention can improve the sound absorption rate in a low frequency band of less than 2500 Hz by forming a micro pore layer having a plurality of pores on the material layer of the shell, The sound absorption performance of the high-frequency and low-frequency sounds can be improved since the sound absorption effect of the base layer having the structure can be improved simultaneously at a high frequency band of 2500 Hz or more.

As a result, the sound absorbing structure and the method of manufacturing the same according to the present invention are installed by being directly attached to the inner wall of the vehicle body or being fitted in a fitting manner, without having to be spaced apart from the inner wall of the car by a certain distance, Not only can it have excellent workability and durability but also can be made lighter and thinner by introducing the microporous layer and can effectively block the noise caused by the engine which is one of the noise sources of the automobile.

1 is a sectional view showing a sound absorbing structure according to an embodiment of the present invention.
2 is a sectional view showing a sound absorbing structure according to a modified example of the present invention.
3 is a process flow diagram illustrating a method for manufacturing a sound absorbing structure according to an embodiment of the present invention.
4 to 5 are process sectional views showing a method of manufacturing a sound absorbing structure according to an embodiment of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention and the manner of achieving them will become apparent with reference to the embodiments described in detail below with reference to the accompanying drawings. It should be understood, however, that the invention is not limited to the disclosed embodiments, but is capable of many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, To fully disclose the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout the specification.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a sound absorbing structure and a method of manufacturing the same according to preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a sectional view showing a sound absorbing structure according to an embodiment of the present invention.

Referring to FIG. 1, a sound absorbing structure 100 according to an embodiment of the present invention includes a base layer 120, a shell layer 140, and a microporous layer 160.

The base layer 120 is disposed at the bottom of the sound absorbing structure 100. It is desirable that the base layer 120 is designed to have a porous structure in the form of a felt, which can improve the sound absorption characteristics in a high frequency band of 2500 Hz or more due to the plate vibration with the shell layer 140, Because.

To this end, the substrate layer 120 may be formed of a material selected from the group consisting of polypropylene (PP), polyethylene terephthalate (PET), polyethylene (PE), polyvinyl alcohol (PVA), ethylene- It is preferably made of at least one organic fiber or glass fiber material selected from polycarbonate (PC), polyimide (PI), polyacrylonitrile (PAN) and polyurethane (PU).

It is preferable that the base layer 120 has a thickness of 5 to 35 mm. When the thickness of the base layer 120 is less than 5 mm, the effect of improving the sound absorption characteristics in a high frequency band of 2500 Hz or more may be insignificant because the thickness is too thin. On the contrary, when the thickness of the base layer 120 is more than 35 mm, the sound absorption characteristics in a high frequency band of 2500 Hz or more are improved, but the weight increase due to the increase in thickness leads to a decrease in weight and thickness, which is not preferable .

The sheath layer 140 is laminated on the base layer 120. The sheath layer 140 is laminated on the base layer 120 and plays a role of improving sound absorption characteristics in a high frequency band of 2500 Hz or more by plate vibration on the base layer 120.

To this end, the outer covering layer 140 may be formed of at least one material selected from the group consisting of polypropylene (PP), polyethylene terephthalate (PET), polyethylene (PE), polyvinyl alcohol (PVA), ethylene-vinyl-acetate (EVA), polyethylene naphthalate It is preferable to use one type of nonwoven fabric selected from polycarbonate (PC), polyimide (PI), polyacrylonitrile (PAN) and polyurethane (PU).

At this time, the outer covering layer 140 is preferably a nonwoven fabric having a unit weight of 50 g / m 2, and the thickness may be approximately 1 mm or less, but the present invention is not limited thereto.

The microporous layer 160 is disposed on the outer covering layer 140 and has a plurality of perforations H exposing a part of the outer covering layer 140. The micro pore layer 160 is disposed on the outer cladding layer 140 and enhances the sound absorption rate in a low frequency band of less than 2500 Hz by a resonance phenomenon through a plurality of pores H. [

At this time, the microporous layer 160 may be formed on the outer covering layer 140 by a printing method. Specifically, the microporous layer 160 is formed by a screen printing method. Such a screen printing method not only can reduce the production cost by simple and easy manufacturing process, but also can be mass-produced by maintaining the production speed of 20 m / min or more.

That is, conventionally, after the microporous material layer is formed, the microporous layer is formed in such a manner that a plurality of pores are formed by punching such as punching, drilling, laser, and etching, thereby limiting the average diameter and perforation rate .

In contrast, in the embodiment of the present invention, since the micro pore layer 160 having a plurality of pores H is formed by a printing method, a separate pore process is not required, and the average diameter and perforation rate It becomes possible to precisely control the driving force.

At this time, the microporous layer 160 may be made of a thermoplastic resin which undergoes a crosslinking reaction by heat. The microporous layer 160 may include at least one selected from plasticizers, stabilizers, fillers, curing catalysts, crosslinking agents, binders, flame retardants, etc., but is not limited thereto. Specifically, the microporous layer 160 is preferably formed of a material containing at least one selected from acrylic resin, vinyl resin and urethane resin.

It is preferable that the plurality of perforations H have an average diameter d of 0.5 to 3.0 mm because a plurality of perforations H are formed when the average diameter d of the plurality of perforations H is out of the above- It is difficult to exhibit the resonance effect due to the design, so it may be difficult to improve the sound absorption rate in the low frequency band of less than 2500 Hz.

The microporous layer 160 preferably has a thickness of 100 to 200 mu m. When the thickness of the microporous layer 160 is less than 100 占 퐉, the thickness of the microporous layer 160 is too thin, and the resonance effect may not be properly exhibited. On the other hand, when the thickness of the microporous layer 160 is more than 200 탆, the effect of increasing the thickness of the effect can be larger, which is not preferable considering the amount of curing and the tendency of thinning.

Also, it is preferable that the microporous layer 160 has a porosity of 10 to 40% per unit area. In this case, the perforation rate refers to the area occupied by the plurality of perforations (H) within the unit area. Therefore, by maintaining the perforation rate within the above-mentioned range, it is possible to improve the sound absorption rate in a low frequency band of less than 2500 Hz by a resonance phenomenon through a plurality of perforations (H).

The sound absorbing structure according to the above-described embodiment of the present invention can improve the sound absorption rate in a low frequency band of less than 2500 Hz by forming a microporous layer having a plurality of pores on the material layer of the shell, The sound absorption performance of the base layer having the porous structure can be improved at the same time by improving the sound absorption rate in the high frequency band of 2500 Hz or more, thereby improving the overall sound absorption performance of the high frequency and the low frequency.

As a result, since the sound-absorbing structure according to the embodiment of the present invention is directly attached to the inner wall of the vehicle or fitted in a fit-fit manner without being spaced apart from the inner wall of the car by a certain distance so as to have an air layer, It is possible to reduce the weight and thickness by introducing the microporous layer and to effectively block the noise caused by the engine which is one of the noise source of the automobile.

2 is a cross-sectional view of a sound absorbing structure according to a modification of the present invention, in which the same reference numerals as in the embodiment of the present invention are assigned the same reference numerals.

2, a sound absorbing structure 100 according to a modification of the present invention includes a microporous layer 160 disposed between the base layer 120 and the sheath layer 140, And has substantially the same structure as that of the sound absorbing structure (100 of FIG. 1) according to the embodiment described with reference to FIG.

That is, a sound absorbing structure 100 according to a modified example of the present invention includes a base layer 120, a shell layer 140 laminated on the base layer 120, and a cover layer 140 between the base layer 120 and the shell layer 140 And includes a microporous layer 160 having a plurality of perforations (H).

The sound absorbing structure 100 according to the modification of the present invention can be manufactured by disposing the micro pore layer 160 between the base layer 120 and the sheath layer 140 so that low frequency It is possible to simultaneously improve the sound absorption rate in the high frequency band of 2500 Hz or more due to the plate vibration of the shell material layer 140 and the sound absorption effect of the base layer 120 having the porous structure The overall sound absorption performance of the high frequency and the low frequency can be improved.

Hereinafter, a method of manufacturing a sound absorbing structure according to an embodiment of the present invention will be described with reference to the accompanying drawings.

FIG. 3 is a process flow chart illustrating a method for manufacturing a sound-absorbing structure according to an embodiment of the present invention, and FIGS. 4 to 5 are sectional views illustrating a method for manufacturing a sound-

3, the method for fabricating a sound absorbing structure according to an embodiment of the present invention includes a microporous layer forming step (S110) on a sheath layer and a base layer adhering step (S120) on a sheath layer.

Forming a microporous layer on the sheath layer

3 and 4, the microporous layer 160 having a plurality of pores H is formed on the upper surface of the shell material layer 140 in the microporous layer formation step S110 on the shell material layer .

At this time, the outer cover layer 140 serves to improve sound absorption characteristics in the high frequency band by the plate vibration. To this end, the outer covering layer 140 may be formed of at least one material selected from the group consisting of polypropylene (PP), polyethylene terephthalate (PET), polyethylene (PE), polyvinyl alcohol (PVA), ethylene-vinyl-acetate (EVA), polyethylene naphthalate It is preferable to use one type of nonwoven fabric selected from polycarbonate (PC), polyimide (PI), polyacrylonitrile (PAN) and polyurethane (PU). The outer covering layer 140 is more preferably a nonwoven fabric having a unit weight of 50 g / m 2, and may have a thickness of about 1 mm or less, but is not limited thereto.

The microporous layer 160 serves to improve a sound absorption rate in a low frequency band of less than 2500 Hz by a resonance phenomenon through a plurality of pores H. [

In this step, the microporous layer 160 is formed by a printing method, more specifically, a screen printing method. Such a screen printing method not only can reduce the production cost by simple and easy manufacturing process, but also can be mass-produced by maintaining the production speed of 20 m / min or more.

That is, conventionally, a microporous layer is formed by applying a microporous material layer and then forming a plurality of pores by a pore-forming method such as punching, drilling, laser, and etching, thereby limiting the average diameter and perforation rate of the pore .

In contrast, in the embodiment of the present invention, since the micro pore layer 160 having a plurality of pores H is formed by a printing method, a separate pore process is not required, and the average diameter and perforation rate It becomes possible to precisely control the driving force.

At this time, the microporous layer 160 may be made of a thermoplastic resin which undergoes a crosslinking reaction by heat. The microporous layer 160 may include at least one selected from plasticizers, stabilizers, fillers, curing catalysts, crosslinking agents, binders, flame retardants, etc., but is not limited thereto. Specifically, the microporous layer 160 is preferably formed of a material containing at least one selected from acrylic resin, vinyl resin and urethane resin.

Coating the base layer on the sheath layer

As shown in FIGS. 3 and 5, the base layer 120 is attached to the lower surface of the outer cover layer 140 in the step of attaching the base layer to the outer cover layer (S120).

At this time, it is desirable that the base layer 120 is designed to have a porous structure in the form of a felt, and the sound absorption characteristics in a high frequency band of 2500 Hz or more can be improved by plate vibration with the shell layer 140, It is because.

To this end, the substrate layer 120 may be formed of a material selected from the group consisting of polypropylene (PP), polyethylene terephthalate (PET), polyethylene (PE), polyvinyl alcohol (PVA), ethylene- It is preferably made of at least one organic fiber or glass fiber material selected from polycarbonate (PC), polyimide (PI), polyacrylonitrile (PAN) and polyurethane (PU).

It is preferable that the base layer 120 has a thickness of 5 to 35 mm. When the thickness of the base layer 120 is less than 5 mm, the effect of improving the sound absorption characteristics in a high frequency band of 2500 Hz or more may be insignificant because the thickness is too thin. On the contrary, when the thickness of the base layer 120 is more than 35 mm, the sound absorption characteristics in a high frequency band of 2500 Hz or more are improved, but the weight increase due to the increase in thickness leads to a decrease in weight and thickness, which is not preferable .

By forming the microporous layer having a plurality of pores on the sheath layer, the sound-absorbing structure manufactured by the above-described processes (S110 to S120) can improve the sound absorption rate in a low frequency band of less than 2500 Hz, The sound absorption performance of the substrate layer having the plate vibration and the porous structure can be improved at the same time by improving the sound absorption rate in the high frequency band of 2500 Hz or more, thereby improving the overall sound absorption performance of the high frequency and low frequency.

As a result, the sound-absorbing structure manufactured by the method according to the embodiment of the present invention can be directly attached to the inner wall of the vehicle or fitted in a fitting manner without being spaced apart from the inner wall of the car, The microporous layer can be lightened and thinned by introducing the microporous layer, and the noise caused by the engine, which is one of the noise sources of the automobile, can be effectively blocked.

Example

Hereinafter, the configuration and operation of the present invention will be described in more detail with reference to preferred embodiments of the present invention. It is to be understood, however, that the same is by way of illustration and example only and is not to be construed in a limiting sense.

The contents not described here are sufficiently technically inferior to those skilled in the art, and a description thereof will be omitted.

1. Manufacture of sound absorbing structure

Example 1

An acrylic resin was printed to a thickness of 80 mu m on a PET nonwoven fabric having a unit weight of 50 g / m < 2 > so as to have a perforation rate of 28.0% and an average perforation diameter of 1.0 mm, thereby forming a microporous layer.

Next, a sound absorbing structure was prepared by laminating a base layer composed of a nonwoven fabric having a microporous layer formed thereon and a PP fiber felt having a thickness of 10 mm.

Example 2

A sound absorbing structure was prepared in the same manner as in Example 1, except that a base layer composed of a nonwoven fabric having a microporous layer formed therein and a PP fiber felt having a thickness of 20 mm was adhered.

Example 3

A sound absorbing structure was prepared in the same manner as in Example 1, except that a base layer composed of a nonwoven fabric having a microporous layer formed therein and a PP fiber felt having a thickness of 30 mm was bonded.

Example 4

The same procedure as in Example 1 was carried out except that a microporous layer was formed by printing an acrylic resin to a thickness of 100 mu m so as to have a perforation rate of 35.0% and an average perforation diameter of 1.5 mm on a PET nonwoven fabric having a unit weight of 50 g / To prepare a sound absorbing structure.

Example 5

The same procedure as in Example 1 was carried out except that a microporous layer was formed by printing an acrylic resin to a thickness of 120 mu m so as to have a perforation rate of 25.0% and an average perforation diameter of 2.0 mm on a PET nonwoven fabric having a unit weight of 50 g / A sound absorbing structure was prepared.

Example 6

An acrylic resin was printed to a thickness of 60 탆 on a nonwoven fabric made of PET having a unit weight of 50 g / m 2 so as to have a perforation rate of 30.0% and an average perforation diameter of 2.0 mm, thereby forming a microporous layer.

Next, the nonwoven fabric having the microporous layer formed thereon was bonded to a base layer made of PP fiber felt having a thickness of 20 mm, and a microporous layer was disposed between the nonwoven fabric and the base layer to prepare a sound absorbing structure.

Comparative Example 1

A sound absorbing structure was prepared by laminating a base layer composed of a PET nonwoven fabric having a unit weight of 50 g / m 2 and a PP fiber felt having a thickness of 10 mm.

Comparative Example 2

A sound absorbing structure was prepared by printing an acrylic resin to a thickness of 80 mu m so as to have a perforation rate of 28.0% and an average perforation diameter of 1.0 mm on a PET nonwoven fabric having a unit weight of 50 g / m < 2 > At this time, the sound absorbing structure was constructed so as to have an air layer by keeping the nonwoven fabric formed with the microporous layer at a distance of 10 mm from the wall.

Comparative Example 3

Except that a microporous layer was formed by printing an acrylic resin to a thickness of 100 mu m so as to have a perforation ratio of 55.0% and an average perforation diameter of 4.0 mm on a PET nonwoven fabric having a unit weight of 50 g / m < 2 & To prepare a sound absorbing structure.

2. Property evaluation

Table 1 and Table 2 show the results of physical property evaluations for the sound-absorbing structure prepared according to Examples 1 to 6 and Comparative Examples 1 to 3.

1. Test method: In-house method (KS F 2814)

2. Measuring equipment (equipment name: model name (manufacturer / country of origin))

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

3. Measurement temperature / humidity: (19.0 ± 0.2) ° C / (60 ± 1.0)% R.H

At this time, the numerical value of the measurement result indicates the sound absorption coefficient of each frequency band measured by the in-pipe method, and the higher the value, the better the sound absorption performance.

[Table 1]

Figure pat00001

[Table 2]

Figure pat00002

As shown in Table 1 and Table 2, the sound-absorbing structure manufactured according to Examples 1 to 6 had a sound absorption ratio of the entire high-frequency band of 2500 Hz or more and the low-frequency band of less than 2500 Hz as measured by the in- And exhibits excellent characteristics.

Particularly, in the case of the sound-absorbing structure manufactured according to Examples 2, 3 and 6, the sound absorption rate was improved in the frequency band of 2500 Hz or less due to the formation of the base layer thicker than those of Examples 1, 4 and 5 Can be confirmed.

On the other hand, the sound-absorbing structure manufactured according to Comparative Example 1 has a structure in which the microporous layer is not formed in Example 1, and as can be seen from the measurement results using the in-tube method, it can be seen that the sound- have.

In addition, the sound-absorbing structure manufactured according to Comparative Example 2 had a structure in which an air layer was introduced in place of the base layer in Example 1, and as a result of the measurement using the in-line method, the sound absorbing performance as a whole .

In addition, although the sound absorbing structure manufactured according to Comparative Example 3 was designed to have a larger thickness than that of Example 1, the average diameter and perforation rate of the perforations were out of the range suggested by the present invention, 1, it can be seen that the overall sound absorption performance is poor.

Although the preferred embodiments of the present invention have been disclosed for illustrative purposes, those skilled in the art will appreciate that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims. These changes and modifications may be made without departing from the scope of the present invention. Accordingly, the scope of the present invention should be determined by the following claims.

100: sound absorbing structure 120: substrate layer
140: outer covering layer 160: microporous layer
H: Perforation
S110: formation of microporous layer on the outer skin layer
S120: Cementing step of substrate layer to the outer skin layer

Claims (13)

A base layer;
A covering material layer laminated on the base layer; And
A microporous layer disposed on the shell material layer and having a plurality of pores exposing a part of the shell material layer;
.
The method according to claim 1,
The base layer
Sound absorbing structure having a thickness of 5 to 35 mm.
The method according to claim 1,
The base layer
(PP), polyethylene terephthalate (PET), polyethylene (PE), polyvinyl alcohol (PVA), ethylene-vinyl-acetate (EVA), polyethylene naphthalate (PEN), polycarbonate PI), polyacrylonitrile (PAN), and polyurethane (PU).
The method according to claim 1,
The outer shell layer
(PP), polyethylene terephthalate (PET), polyethylene (PE), polyvinyl alcohol (PVA), ethylene-vinyl-acetate (EVA), polyethylene naphthalate (PEN), polycarbonate PI), polyacrylonitrile (PAN), and polyurethane (PU).
The method according to claim 1,
The plurality of perforations
A sound absorbing structure having an average diameter of 0.5 to 3.0 mm.
The method according to claim 1,
The microporous layer
A sound absorbing structure having a thickness of 10 to 200 mu m.
The method according to claim 1,
The microporous layer
An acrylic resin, a vinyl resin, and a urethane resin.
The method according to claim 1,
The microporous layer
A sound absorbing structure having a perforation rate of 10 to 40% per unit area.
A base layer;
A covering material layer laminated on the base layer; And
A microporous layer disposed between the substrate layer and the sheath layer, the microporous layer having a plurality of pores;
.
(a) forming a microporous layer having a plurality of pores on an upper surface of a shell material layer; And
(b) attaching a base layer to the lower surface of the outer covering layer;
Wherein the sound absorbing structure is made of a synthetic resin.
11. The method of claim 10,
The microporous layer
Based resin, an acrylic resin, a vinyl-based resin and a urethane-based resin to a thickness of 10 to 200 탆.
11. The method of claim 10,
In the step (a-1)
The microporous layer
Wherein the sound absorbing structure is formed by a printing method.
11. The method of claim 10,
In the step (b)
The base layer
(PP), polyethylene terephthalate (PET), polyethylene (PE), polyvinyl alcohol (PVA), ethylene-vinyl-acetate (EVA), polyethylene naphthalate (PEN), polycarbonate (PU), polyacrylonitrile (PAN), and polyurethane (PU), to a thickness of 5 to 35 mm.
KR1020160021448A 2016-02-23 2016-02-23 Sound absorbing structure and method of manufacturing the same KR20170099276A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020160021448A KR20170099276A (en) 2016-02-23 2016-02-23 Sound absorbing structure and method of manufacturing the same

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020160021448A KR20170099276A (en) 2016-02-23 2016-02-23 Sound absorbing structure and method of manufacturing the same

Publications (1)

Publication Number Publication Date
KR20170099276A true KR20170099276A (en) 2017-08-31

Family

ID=59761125

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020160021448A KR20170099276A (en) 2016-02-23 2016-02-23 Sound absorbing structure and method of manufacturing the same

Country Status (1)

Country Link
KR (1) KR20170099276A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20210183350A1 (en) * 2018-10-26 2021-06-17 Mt-Tec Llc Noise Insulation Material For Automobile

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20210183350A1 (en) * 2018-10-26 2021-06-17 Mt-Tec Llc Noise Insulation Material For Automobile
US11881198B2 (en) * 2018-10-26 2024-01-23 Kotobukiya Fronte Co., Ltd. Noise insulation material for automobile

Similar Documents

Publication Publication Date Title
US8590669B2 (en) Sound attenuating device using an embedded layer for acoustical tuning
JPH05504528A (en) Sound insulation interior materials for automobiles
EP1792725B1 (en) Soundproof material
KR101550234B1 (en) Automotive trim part for sound insulation and absorption
JP4997057B2 (en) Sound insulation for vehicles
KR20160130859A (en) Multilayer sound absorbing sheet
CN110562156A (en) Vehicle sound insulating material and wire harness assembly
JP2012196966A (en) Soundproof assembly, its use for soundproof sealed space, and method for manufacturing the same
KR20140002734A (en) Automotive noise attenuating trim part
JP6098434B2 (en) Sound absorbing material and wire harness with sound absorbing material
JP2009291500A (en) Carpet and method for manufacturing the same
JP2010076756A (en) Soundproofing assembly with thin film for automobile, and related automobile
JP2019513620A (en) Method of manufacturing soundproof trim panel for automobile interior
JP7326649B2 (en) automotive sound insulation
KR101846574B1 (en) Composite sound absorbing materials for automobile and manufacture method of the same
TW201830376A (en) Noise attenuating trim part for a vehicle and the use thereof
KR20170099276A (en) Sound absorbing structure and method of manufacturing the same
KR101447626B1 (en) Carpet capable absorbing and isolating function of sounds for vehicle
JP2006208859A (en) Sound insulating material
KR101424102B1 (en) Noise absorption and insulation materials and Producing Method
US20110285178A1 (en) Acoustically absorptive vehicle headliner
JP3930484B2 (en) Ultralight soundproof material
US20160159295A1 (en) Hood insulator including a non-woven fabric and a fine resonance layer and a method of manufacturing the same
JP3530522B1 (en) Ultralight soundproofing material
KR101497379B1 (en) Insulation for vehicle

Legal Events

Date Code Title Description
A201 Request for examination
E902 Notification of reason for refusal
AMND Amendment
E601 Decision to refuse application
AMND Amendment