KR20030083395A - Polyester sound-absorbing material - Google Patents

Abstract

PURPOSE: A sound absorbing material is characterized by using polyester, forming round dots and adding inorganic powder to a silicone type binder resin. The sound absorbing material is capable of increasing workability, dissolving environmental pollution, increasing sound absorption power, preventing a slip, improving handling and construction, radiating far infrared ray, preventing mildew and a bad smell and getting fire resistance. CONSTITUTION: The polyester sound absorbing material is comprised of: 10-45wt.% of a cellulose fixing agent of polyester fiber having 3-10denier of fineness, 30-80mm of fiber length and low melting-point; 55-90wt.% of polyester fiber mixed a first polyester fiber having 10-15denier of fineness and 51-81mm of fiber length with a second polyester fiber having 3-5denier and 51-81mm of fiber length in a ratio of 1:1-1:2; and web. The sound absorbing material is obtained by forming the dots out of 80-100pts.wt. of the inorganic powder based on 100pts.wt. of the binder resin.

Description

Polyester sound-absorbing material {POLYESTER SOUND-ABSORBING MATERIAL}

The present invention relates to a high-density polyester sound-absorbing material used in buildings such as conference rooms, hotels, music rooms, etc., automobiles or road soundproof walls, and particularly, by using polyester fibers, which are widely used in clothing and industrial use, and have excellent sound absorption performance. There is no need for protective equipment during construction, and the present invention relates to a polyester sound-absorbing material which is inexpensive and recyclable due to its convenient transportation and construction.

As the industrial development is highly developed, a lot of noise is caused by the increase in the use of various means of transportation and industrial machinery, which is a serious pollution problem. In conclusion, it is best to reduce the noise source to solve the noise pollution, but this is not practical. Therefore, many studies have been conducted to solve the noise pollution, and the best way to reduce the noise pollution is to effectively reduce the noise generated from the noise source. However, this method has a problem in that the improvement range is practically limited by interlocking with operating conditions, operating costs, and efficiency.

Accordingly, in order to solve the noise generated from the noise source, a method of reducing the noise by absorbing or blocking the noise waves generated from the noise source by using a sound absorbing material made of a porous material has been proposed. Rock wool, synthetic resin foams and the like are known.

However, in the case of a sound absorbing material made of glass fiber or rock wool, when exposed to the air, particulates are generated by weathering, which not only increases air pollution, but also adversely affects the human body, and cannot be recycled. There is also a problem that is difficult to discard. In addition, there is a risk of damage in the process of transport and handling because the binding strength between the fibers are weak, and as the microparticles are easily attached to the skin by the sweat or moisture of the operator during construction, it causes symptoms and allergies to the operator.

On the other hand, U.S. Patent No. 5,304,415 proposes a sound absorbing material in which porous fine particles such as calcium silicate, silica, mica and the like are contained in a polyester nonwoven fabric to increase sound absorption in a low frequency region. However, in the case of the sound absorbing material, the particles have to be located in the pore area through which sound waves pass, so that the sound absorbing performance can be increased. In addition, the sound absorbing performance is degraded after a certain period of time because the particles are easily fixed and separated. have.

In addition, U.S. Patent No. 4,056,161 proposes a sound absorbing material coated with a polyvinyl chloride cover for the purpose of preventing the sagging of the sound absorbing material due to the ease of handling during construction and moisture in rainy weather on one side of the existing sound absorbing material of the glass surface material. In the case of soundproofing, there is a problem that sound absorption is lowered due to sound recording and the manufacturing cost is increased.

In general, when the sound absorbing equipment is installed in a public place such as a theater, a flame-retardant finish fabric is used on the surface of a compressed glass board or urethane foam.However, as part of cost reduction and product diversification, the fabric is finished at one time without finishing the fabric. There are researches on the sound absorbing and finishing works. In order to obtain a suitable product, supplementing the aesthetics and securing the flame retardant level 2 in the small-law method are required as the most important prerequisites.

Accordingly, the present invention has been made in consideration of the above-described problems as well as the above-mentioned problems, and has excellent sound absorption effect, convenient handling and construction, and can improve aesthetics, while also preventing other slipping effects, far-infrared emission, and antimicrobial reinforcement. An object of the present invention is to provide a multifunctional polyester sound absorbing material capable of obtaining various effects such as a deodorizing effect.

In order to achieve the above object, the polyester sound-absorbing material according to the present invention has a fiber fixing agent of 10 to 45% by weight and fiber thickness of a low melting polyester fiber having a fiber thickness of 3 to 10 denier and a fiber length of 30 to 80 mm General mixture of 1 to 1 denier with 10 to 15 denier and 51 to 81 mm of fiber length and 2 to 2 polyester fibers with fiber thickness of 3 to 5 denier and 51 to 81 mm of fiber It consists of 55 to 90% by weight of polyester fibers and is laminated in multiple layers with webs having different fiber orientations, at least one surface of which is made of silicon as a binder resin and 80 to 100 inorganic powders relative to 100 parts by weight of the binder resin. It is characterized in that the dots are formed of a composition mixed by weight.

In the case of the polyester sound-absorbing material made in this way, the specific surface area is increased by dot treatment, and the sound absorption is improved, as well as various functions are secured and aesthetically excellent.

The first polyester fiber having a 10 to 15 denier fiber thickness may include 10% by weight of colored fibers, and in this case, a polyester sound absorbing material having the same color as the color soundproof wall may be obtained.

In the present invention, in the case of a low melting polyester fiber used as a cellulose fixative, when the fiber thickness is less than 3 denier, nep is generated due to poor carding at the time of web manufacturing, and when it exceeds 10 denier, the sound absorbency of the polyester sound absorbing material is exceeded. This deterioration occurs, which is not preferable.

In addition, when the content of the low-melting polyester fiber is less than 10% by weight, durability and strength of the web structure decrease due to the lack of bonding strength in the polyester sound absorbing material, and when the content exceeds 45% by weight, the noise is increased due to the smoothness of the surface. Since it is difficult to penetrate into this polyester sound absorption material and a sound absorption rate falls, it is preferable that low melting point polyester fiber and general polyester fiber are mixed by said weight ratio.

In addition, in the case of the inorganic powder, it is preferable that SiO _{2 type} inorganic powder having excellent far-infrared emission effect and antibacterial deodorizing effect is used.

In addition, the size of the dot is 2 to 5mm in diameter and the interval between the dots is preferably of a circular within 1.5cm, the dot is formed in a non-directional form to facilitate alignment during the construction of the polyester sound-absorbing material It is desirable to be.

Hereinafter, the present invention will be described in detail by examples.

The measurement of sound absorption properties and physical properties of the polyester sound absorbing material obtained in the following examples was carried out by the following method.

<Method of measuring sound absorption of sound absorbing material>

Absorption rate measurement method was measured based on the Korean Industrial Standard KS F 2805 "Method of absorption rate in the reverberation chamber". That is, the reverberation chamber method sound absorption can be obtained from the average value of the reverberation time according to the following equation (1).

Where a is the reverberation chamber method sound absorption rate, V is the reverberation chamber volume (m 3), T1 is the reverberation time (s) with the sample inserted, T2 is the reverberation time (s) without the sample, and S is the sample area ( M), c denotes the speed of sound in air (m / s) (c = 331.5 + 0.6 t), and t denotes the temperature of the air (° C).

<Sample and installation method>

A sample having a sample area of 12 m 2, a density of 20K (kg / m 3), and a thickness of 80T (mm) was installed at the center of the reverberation chamber bottom 1 m or more away from the reverberation chamber wall.

<Measurement of Reverberation Time>

The measurement of the reverberation time was carried out with 25 sonic points in the reverberation chamber, and the total number of measurements per frequency is shown in Table 1 below.

Center frequency (Hz) 125 160 200 250 315 400 500 630 800 Number of measurements 25 or more More than 15 Center frequency (Hz) 1k 1.25k 1.6k 2k 2.5k 3.15k 4k Number of measurements 9 or more

Example 1

25 parts by weight of a first polyester fiber having a fiber thickness of 15 deniers and a fiber length of 76 mm, 40 parts by weight of a second polyester fiber having a fiber thickness of 5 deniers and a fiber length of 76 mm, a fiber thickness of 3 deniers and a fiber length of 76 mm. 50 parts by weight of phosphorus low-melting polyester fibers were mixed and laminated with a common carding machine to prepare a polyester sound absorbing material having a density of 200K (kg / m 3) and a thickness of 9T (mm). Then, silicon resin is used as the binder resin on the surface or both sides of the polyester sound absorbing material, and 80 parts by weight of an inorganic powder having far-infrared emission and deodorizing effect is added to 100 parts by weight of the binder resin, and the dot treatment (dot size is 2 Mm and the spacing between the dots was within 1.5 cm. Sound absorption and physical properties at this time are shown in Table 2.

Example 2

After preparing the polyester sound-absorbing material of the main body as in Example 1, using a silicone resin as a binder resin on the surface or both sides, 80 parts by weight of an inorganic powder having far-infrared emission and deodorizing effect is added to 100 parts by weight of the binder resin Dot treatment (dots were rectangular with a width of 2 mm and a length of 5 mm and the spacing between dots within 1.5 cm). Sound absorption and physical properties at this time are shown in Table 2.

Example 3

After preparing the polyester sound-absorbing material of the main body as in Example 1, using a silicone resin as a binder resin on the surface or both sides, 80 parts by weight of an inorganic powder having far-infrared emission and deodorizing effect is added to 100 parts by weight of the binder resin The dot treatment (dot was 2 mm in diameter, and the spacing between dots was within 1 cm). Sound absorption and physical properties at this time are shown in Table 2.

Comparative Example 1

After preparing the polyester sound-absorbing material of the main body as in Example 1, using a silicone resin as a binder resin on the surface or both sides, 120 parts by weight of an inorganic powder having far-infrared emission and deodorizing effect to 100 parts by weight of the binder resin Dot treatment (dots were rectangular with a width of 2 mm and a length of 5 mm and the spacing between dots within 1.5 cm). Sound absorption and physical properties at this time are shown in Table 2.

Comparative Example 2

After preparing the polyester sound-absorbing material of the main body as in Example 1, the unsaturated polyester resin on the surface or both sides as a binder resin, 100 weight parts of inorganic powder having far-infrared emission and deodorizing effect to 100 parts by weight of the binder resin It was added and added to the dot treatment (dots were rectangular with a width of 2 mm and a length of 5 mm and the spacing between dots within 1.5 cm). Sound absorption and physical properties at this time are shown in Table 2.

division Example 1 Example 2 Example 3 Comparative Example 1 Comparative Example 2 Used binder Silicone resin Silicone resin Silicone resin Silicone resin Unsaturated Polyester Resin Inorganic Powder Content 80 80 80 120 100 Dot shape 2mm diameter round spacing 1.5cm 2mm width 5mm square spacing 1.5cm 2mm width 5mm square spacing 1.5cm 2mm width 5mm square spacing 1.5cm 2mm width 5mm square spacing 1.5cm Exterior Good Good Good Poor dot formation due to excessive powder Dot breaks due to hardening of resin Workability and aesthetics Good Difficult alignment Good Difficult alignment Shock attention at work NRC value (sound absorbing material) 0.73 0.75 0.80 0.67 0.70 Comprehensive Evaluation Great usually Great Inadequate Inadequate

In the polyester sound-absorbing material according to the present invention configured as described above, by forming the sound-absorbing material from the polyester fiber to solve the problems such as difficulty of work, environmental pollution, difficulty in disposal during disassembly, which is a problem in the sound absorbing material using conventional glass or rock wool Not only can it be done, but the specific surface area is increased by dots, so that the sound absorption effect is excellent, and handling and construction are convenient.

In addition, by forming the dots according to the present invention on the surface can improve the aesthetics can be carried out at the same time without the finishing of the fabric and the sound-absorbing and finish construction at the same time and the slip can be prevented, the embodiment and comparative example As can be seen, the shape of the dot has the best effect.

In addition, by adding an inorganic powder such as SiO ₂ to the silicone binder resin used for dot formation, an additional effect of obtaining far infrared ray emission and antibacterial deodorization effect can be achieved. Preventive effect, odor prevention effect and flame retardant effect over fire extinguishing standards can be obtained.

Claims (3)

10 to 45% by weight of a fiber fixative of low melting polyester fibers having a fiber thickness of 3 to 10 denier and a fiber length of 30 to 80 mm, and a first polyester having a fiber thickness of 10 to 15 denier and a fiber length of 51 to 81 mm The second polyester fiber with fiber and fiber thickness of 3 to 5 denier and 51 to 81 mm in length is composed of 55 to 90% by weight of general polyester fiber composed of 1: 1 to 1: 2, and has a different fiber orientation. A polyester sound-absorbing material, which is formed by laminating a plurality of layers, wherein dots are formed from a composition in which a silicone resin is used as a binder resin and at least one surface is mixed with 80 to 100 parts by weight based on 100 parts by weight of the binder resin. . The method of claim 1, The dot is a polyester sound-absorbing material, characterized in that the size of the circular 2 ~ 5mm in diameter and the interval between the dots within 1.5cm. The method of claim 1, The inorganic powder is a polyester sound-absorbing material, characterized in that the SiO _{2 type} inorganic powder.