KR200279605Y1 - Polyester non-woven composite sheet having excellent sound-absorbing and sound-blocking properties - Google Patents

Abstract

The present invention discloses a polyester nonwoven composite plate. Rubber sheet layer for increasing the effect for absorbing and blocking sound waves; And a polyester nonwoven composite plate bonded to one or both surfaces of the rubber plate layer and including a polyester nonwoven layer that absorbs and blocks sound waves, and has excellent sound absorbing and insulating properties, heat insulating properties, shock absorption, and vibration absorption. Therefore, it can be effectively used as interior and exterior materials for building, partition boards and the like.

Description

Polyester non-woven composite sheet having excellent sound-absorbing and sound-blocking properties

The present invention relates to a fiber board material, and more particularly, it can be used as a building interior and exterior materials, partition boards, etc., and relates to a PE nonwoven composite plate material having excellent sound absorbing and insulating properties, heat insulating properties, shock absorption, and vibration absorption.

As the interior and exterior materials for building and partition boards, hard boards are used in which compressed wood is bonded to at least one surface of insulation materials such as rock wool, gypsum board, glass fiber, and styrofoam, but these boards are harmful to human body. Known to discharge the material, there is also a problem such as recycling is not possible cause environmental pollution. Therefore, in recent years, the fiber board material manufactured by compressing the organic polymer fibers is actively used as interior and exterior materials for building, partition boards and the like.

The following methods are known with respect to the production of conventional fiberboard materials. For example, Korean Patent Publication No. 87-5764 discloses a web made by crushing fibrous polypropylene finely and cutting chemical fibers such as acrylic, PE, and nylon to about 10 mm and putting it in a carding machine in a heating chamber for a predetermined time. Disclosed is a fiber board material which is cut after heating and compression molded into a pressure plate. However, there is a problem in that the fiber board by cutting the fiber is cut into short fibers of about 10mm is less entangled between the short fibers are broken well.

Korean Patent Publication No. 95-6863 discloses a fiber thread by cutting waste islands into 50 ~ 100mm long fibers, and then spinning them on the other side of the machine to make cotton. Disclosed is a method of manufacturing a fiber board material by heating and pressing at high temperature and high pressure so as to be integral with each other. However, since the fiber board produced by this method is molded at high temperature and high pressure, it causes decomposition of the polymer material, which is a fiber constituent, and has a problem in that the intrinsic properties of the fiber are lost.

Korean Patent Application Publication No. 01-0084426, filed on February 25, 2000 and published on September 6, 2001, discloses a low melting point of at least 50 ° C. and a melting point of at least 50 ° C. lower than that of the high melting point PE fiber. Disclosed is a PE fiber sheet comprising 50 wt% or less of a melting point PE fiber mixed. However, the PE fiber board produced by this method has a good sound absorption effect, but the sound insulation effect is low, leaving room for improvement in terms of sound insulation effect.

In addition, Korean Patent Application Publication No. 01-0107523, filed by the applicant on January 9, 2001 and published on December 9, 2001, applies a workpiece, a hard or low-density fibreboard, containing heat-sealing fibers to a hot plate hot press. Heating and compressing, but heating and compressing the non-woven fabric or woven fabric which is not fused to the heating plate at the operating temperature of the hot plate type hot press by heating and compressing it at least while covering the front and back surfaces of the workpiece perpendicular to the compression direction of the heating plate. Disclosed is a method for producing a high-density fibreboard material comprising the steps of cooling in a state in which the non-woven fabric or woven fabric is covered by discharge from the hot press after molding to. However, this method can produce a high-density fibreboard having excellent quality uniformity through a simple manufacturing equipment and process, but the fibrous board produced thereby also has a good sound absorption effect, but the soundproofing effect is low and the soundproofing effect is not sufficient.

Korean Patent Application Publication No. 02-0014032, filed by the applicant on August 14, 2000 and published on February 25, 2002, discloses a flame retardant PE fiber board having a flame retardant coating coated on the surface of the PE fiber board. PE fiber board manufactured by this method has excellent flame retardancy and can exhibit self-extinguishing which is extinguished even when the flame is removed even in fire. However, when applied as a building interior material or partition plate, it still achieves sound insulation effect only by sound absorbing mechanism and sound insulation effect. It can not be used, leaving room for improvement in terms of sound insulation effect.

Therefore, the technical problem to be achieved by the present invention is to provide a PE non-woven composite plate excellent in soundproofing effect by removing the problems of the conventional fiberboard material can exhibit not only sound absorption but also sound insulation effect.

1 is a perspective view showing a polyester (hereinafter referred to as "PE") fiber composite sheet according to the first aspect of the present invention.

Figure 2 is a perspective view showing a PE nonwoven composite plate according to a second aspect of the present invention.

Figure 3 is a perspective view showing a PE nonwoven composite plate according to a third aspect of the present invention.

Figure 4 shows a fiberboard manufacturing apparatus used to manufacture a PE nonwoven composite plate according to the heat-cooling compression method of Example 1.

Figure 5 shows a hot plate type hot press apparatus for wood processing used to manufacture a PE nonwoven composite plate according to the hot press method of Example 2.

<Description of Major Symbols in Drawing>

1: rubber plate layer 3: upper PE nonwoven layer

5: lower PE nonwoven layer

The present invention to achieve the above technical problem,

Rubber sheet layer for increasing the effect for absorbing and blocking sound waves; And

Provided is a PE nonwoven composite plate material that is bonded to one or both surfaces of the rubber plate layer and includes a PE nonwoven layer to absorb and block sound waves.

In the composite plate according to the present invention, the PE nonwoven layer is randomly mixed with 30 ~ 90% by weight of the high melting point PE fiber and 10 ~ 70% by weight of the low melting point PE fiber 20 ℃ or more lower than the high melting point PE fiber It is preferred that there is a PE nonwoven layer.

In the composite sheet according to the present invention, the rubber sheet layer is preferably made of styrene-butadiene rubber, acrylonitrile-butadiene rubber, natural rubber, synthetic isoprene rubber, neoprene rubber, ethylene-vinylacetate copolymer rubber or mixtures thereof Do.

In the composite sheet according to the present invention, the high melting point PE fiber is ethylene glycol, 1,3-propanediol or 1,4-butanediol and dimethyl terephthalate (DMT), terephthalic acid (TPA), dimethyl-2,6-naphthalene It is preferred that it is a polymerization product of dicarboxylate (NDC) or 2,6-naphthalenedicarboxylic acid (NDA).

In the composite sheet according to the present invention, the low melting point PE fiber is preferably a polymerization product of ethylene glycol, 1,3-propanediol, or 1,4-butanediol and aliphatic dicarboxylic acid having 4 to 10 carbon atoms.

Composite plate according to the present invention,

On at least one surface of the rubber sheet layer, a fiber aggregate in which 30 to 90% by weight of the high melting point PE fiber and 10 to 70% by weight of the low melting point PE fiber having a melting point of 20 ° C or more lower than that of the high melting point PE fiber are randomly mixed. In addition, uniformly disposing the low melting point PE pellets between the rubber sheet layer and the fiber assembly; And

By heating the resultant to a temperature lower than the melting point of the high melting point PE fiber and higher than the melting point of the low melting point PE fiber, the fiber aggregate is compressed into a PE nonwoven layer, and the PE nonwoven layer is further lowered. Melting point PE pellets may be prepared by a method for producing a PE non-woven composite sheet comprising the step of adhering to the rubber sheet layer by a melt formed.

In the first aspect of the manufacturing method of the composite plate according to the present invention, the heating step is made by hot air of 120 ~ 200 ℃, the compression step is made by a cold compression roller cooled to 0 ~ 5 ℃. Can be.

In the second aspect of the manufacturing method of the composite plate according to the present invention, the heating step and the compression step is a non-woven fabric or woven fabric which is not fused to the heating plate at the operating temperature of the hot plate hot press in the hot plate hot press It may be carried out at the same time in a state covering at least the front and back surface of the resultant perpendicular to the compression direction of the heating plate.

Hereinafter, first, the PE nonwoven composite plate according to the present invention will be described, and then the manufacturing method thereof will be described in detail.

1 is a perspective view showing a PE nonwoven composite sheet according to the first aspect of the present invention. Referring to Figure 1, the PE nonwoven composite plate of the present invention consists of a rubber sheet layer (1), the upper PE nonwoven layer 3 and the lower PE nonwoven layer (5). The upper nonwoven fabric layer 3 and the lower nonwoven fabric layer 5 have the same thickness, and are bonded to the rubber sheet layer 1 by a special method to be described below. The rubber sheet layer (1) is a result of a careful examination through a number of tests by the present inventors to improve the point that the conventional fiberboard material is composed only of the fiberboard material layer and only exhibits a function of absorbing sound waves, so that the soundproofing effect is not sufficient. Adopted, it has the ability to absorb and block sound waves. The inventors tested resin plates made of polymethyl methacrylate, polystyrene, polyethylene, polypropylene, ABS resin as sound wave blocking layer, but rubber plates made of synthetic rubber or natural rubber in terms of sonic blocking effect and impact resistance. It was found that the ash layer was the most excellent. This rubber sheet layer 1 is composed of styrene-butadiene rubber (SBR), acrylonitrile-butadiene rubber (NBR), natural rubber, synthetic isoprene rubber, neoprene rubber, Preference is given to ethylene-vinylacetate copolymer (EVA) rubber or mixtures thereof.

Both the upper PE nonwoven layer 3 and the lower PE nonwoven layer 5 adhered to the rubber sheet layer 1 are equally 30 to 90% by weight of the high melting point PE fiber and 20 degrees Celsius lower than the high melting point PE fiber. It consists of a high density PE nonwoven layer with 10 to 70% by weight of low melting point PE fibers randomly mixed. At this time, the high melting point PE fiber serves to increase the heat resistance and mechanical strength, and the low melting point PE fiber is melted by heat when the PE fiber assembly is heat-compressed and molded into the PE nonwoven layers 3 and 5 during the manufacturing process to be described below. It serves to bond with the high melting point PE fiber and to increase the adhesive force with the rubber sheet layer. If the ratio of the low melting point PE fiber is less than 10% by weight, there is a problem that the bonding force is not sufficient, if the ratio exceeds 70% by weight there is a problem that the mechanical strength and heat resistance of the manufactured composite plate material is lowered.

The melting point difference between the low-melting PE fibers and the high-melting PE fibers is at least 20 ° C, preferably at least 50 ° C, more preferably at least 80 ° C, most preferably at least 100 ° C from the viewpoint of work convenience.

The fineness of the low melting point PE fiber and the high melting point PE fiber may be the same as or different from each other, and may be used by mixing several finenesses. Preferred fineness ranges from 2 to 50 days. When the fineness is less than 2 denier, the touch of the composite plate is soft and beautiful, but there is a problem that the manufacturing cost increases rapidly. If the fineness is more than 50 days, the touch of the composite plate is landscaped, and there is a problem that the soundproofing effect is poor.

The fiber fields of the low melting PE fibers and the high melting PE fibers may be the same or different from each other. Preferred fiber length ranges from 40 to 70 mm. If the fiber length is less than 40mm, there is a problem in carding and formability during web manufacturing. If the fiber length exceeds 70mm, there is a problem of carding during web manufacturing.

The high melting point PE fiber is ethylene glycol, 1,3-propanediol or 1,4-butanediol and dimethyl terephthalate (DMT), terephthalic acid (TPA), dimethyl-2,6-naphthalenedicarboxylate (NDC) or 2 Polyethylene terephthalate (PET), polytrimethylene terephthalate (PTT), polybutylene terephthalate (PBT) and polyethylene naphthalate (PEN), which are polymerization products of 6-naphthalenedicarboxylic acid (NDA), are preferred. , PET, PTT, and PBT are particularly preferable in view of availability, economy, and the like.

Low melting point PE fibers are polyethylene succinate, polyethylene glutarate, polyethylene adipate, poly, which is a polymerization product of ethylene glycol, 1,3-propanediol or 1,4-butanediol and aliphatic dicarboxylic acids having 4 to 10 carbon atoms. Ethylene pimelate, polyethylene subberate, polyethylene azelate, polyethylene sebacate, polytrimethylene succinate, polytrimethylene adipate, polytrimethylene azelate, polytetramethylene succinate, polytetramethylene adipate, polytetramethylene Azelates, polytetramethylene sebacate, etc. are preferable.

Instead of using a fiber assembly composed of a mixture of high melting point PE fibers and low melting point PE fibers, as described above, the high melting point PE melt and the low melting point PE melt are side-by-side, sheath / core, and multi-sided. A fiber assembly of composite fibers obtained by complex spinning in the form of a biside type, an axial composite type, or a fiber assembly of mixed fiber spun by spinning a high melting point PE melt and a low melting point PE melt can be used.

Figure 2 is a perspective view showing a PE nonwoven composite plate according to a second aspect of the present invention. The PE nonwoven composite sheet according to the second aspect differs from the composite sheet according to the first aspect only in that either layer of the upper nonwoven fabric layer 3 or the lower nonwoven fabric layer 5 is thinner than the other layer. The layer 3 is shown to be thinner than the lower nonwoven layer 5.

Figure 3 is a perspective view showing a PE nonwoven composite plate according to a third aspect of the present invention. The PE nonwoven composite sheet according to the third aspect differs from the composite sheet according to the first or second aspect only in that there is no layer of the upper nonwoven layer 3 or the lower nonwoven layer 5, the composite according to this aspect. Plates are used primarily for wall finishing rather than partitioning.

Hereinafter, a method for manufacturing a PE nonwoven composite plate material according to the present invention.

The manufacturing method according to the first aspect of the present invention uses a low temperature fusion method because it is advantageous to maintain the fiber form and physical properties of the high melting point fibers. This method produces a PE nonwoven composite sheet in the following manner.

That is, first, at least one surface of the rubber sheet layer, 30 to 90% by weight of the high melting point PE fiber and 10 to 70% by weight of the low melting point PE fiber having a melting point of 20 ° C or more lower than the high melting point PE fiber is randomly mixed In this case, a PE resin pellet made of the same chemical composition as that of the low melting point PE fiber is uniformly disposed between the rubber sheet layer and the fiber assembly. A distinct advantage and characteristic of the manufacturing method according to the present invention is to use the low melting point PE pellets, rather than using an adhesive in which organic polymers are dissolved in a toxic organic solvent when bonding different layers as in the prior art. . In this manner, the bonding of the PE sheet and the nonwoven fabric layer produced by heating and compressing the rubber sheet layer has an advantage of eliminating the problem of worker's health and environmental pollution resulting from evaporation of toxic organic solvent.

The resultant is then heated to a temperature below the melting point of the high melting PE fiber and above the melting point of the low melting PE fiber. This heating temperature depends on the melting point of the selected high melting point PE fiber and low melting point PE fiber, but when heated by hot air of 90 ~ 200 ℃, low melting point PE fiber is partially or completely melted but high melting point PE fiber helps It can be softened to some extent but not melted. Subsequently, when the resultant is compressed, the fiber assembly is compressed to a high density PE nonwoven layer and adhered to the rubber sheet layer. This compression process is preferably carried out by passing the resultant to the cooling compression roller cooled to 5 ~ 10 ℃, because the problem of wrinkles in the composite plate does not occur when cooled in the ion range. At this time, the PE nonwoven layer is bonded to the rubber sheet layer by the melt of the low melting point PE pellet formed by melting in the previous heating step. In addition, since the low melting point fibers in the PE nonwoven layer are also partially or completely melted and combined with the high melting point fibers, the structure of the nonwoven layer becomes dense overall to increase the mechanical strength of the nonwoven layer and increase the absorption and blocking effect of sound waves. . Subsequently, when the heating and pressing process is completed, the obtained composite plate is cooled to complete the PE nonwoven composite plate according to the present invention. Meanwhile, the heating and compression process may be repeated several times.

However, the manufacturing method according to the first aspect also involves the following disadvantages. In other words, there is an increasing demand for thinner, higher density and higher strength fiber boards, which increase the number of compression rolls and increase the compression pressure gradually toward downstream compression rolls. In order to achieve the desired thickness, density and strength by adopting this method, the apparatus has to be increased by several times more than the number of compression rolls of the existing apparatus, so that the apparatus has to be large and the installation space is much larger. An excessive increase in production costs is inevitable.

The manufacturing method according to the second aspect of the present invention is a high temperature fusion method using a hot plate type hot press to solve the above problems, which is an economical method that can simplify the process by performing heating and compression at the same time. This method produces a PE nonwoven composite sheet in the following manner.

That is, also in this method, first, at least one surface of the rubber sheet layer, a fiber assembly in which 30 to 90% by weight of the high melting point PE fiber and 10 to 70% by weight of the low low melting point PE fiber is randomly mixed. PE resin pellets made of the same chemical composition as the low melting PE fibers are uniformly disposed between the re-layer and the fiber assembly.

Subsequently, in a hot plate hot press, the resultant is heated simultaneously with a nonwoven fabric or a woven fabric which is not fused to the hot plate at the operating temperature of the hot plate hot press while covering at least the front and back surfaces of the resultant perpendicular to the compression direction of the hot plate. And compression to produce a PE nonwoven composite plate. At this time, if the temperature of the hot press is properly controlled, the high melting point fibers are not melted but the low melting point fibers are melted, and at the same time, the fiber assembly is compressed into a PE nonwoven layer, and the PE nonwoven layer is formed of the low melting point PE pellets. The melt is formed to be bonded to the rubber sheet layer by the melt. Subsequently, cooling and thickness control in a press cooled to 0 to 5 ° C. obtained in a state where the nonwoven fabric or the woven fabric is covered to complete the PE nonwoven composite plate material according to the present invention. If the cooling temperature of the press is less than 0 ℃ condensation occurs and there is a problem that the cooling cost increases, if it exceeds 5 ℃ cooling time increases and there is a problem that the uniformity of the strength of the composite plate is lowered.

In the manufacturing method according to the second aspect of the present invention, the main function of the woven or nonwoven fabric is to prevent fusion of the workpiece to the hot plate of the hot press during heating and compression. Therefore, it is preferable that the woven or nonwoven fabric is made of a high melting point fiber that is not fused to a heating plate during heat compression in a hot press. In addition, it is more effective if the material does not pyrolyze at the time of heat compression. The covered woven fabric or nonwoven fabric can be made of synthetic fibers, natural fibers or mixed fibers thereof. Although not particularly limited, the nonwoven fabric is preferably a long woven fabric, and the woven fabric is an effective PE woven or cotton woven fabric having a thickness of 0.5 mm or more, in terms of separability and insulation. Of course, the present invention is not limited to the above-described woven fabric, and can be effectively used even if it is made of any thickness, weaving method and material as long as it can ensure heat resistance and uniform heating and cooling to withstand heat compression.

Hereinafter, the present invention will be described in more detail with reference to the embodiments, which are merely illustrative and the present invention is not limited thereto. This will make the features and other advantages of the present invention clear.

Example 1

In the fiber board manufacturing apparatus shown in FIG. 4, a PE nonwoven composite sheet was manufactured through the following process. First, 30 wt% of low-density PE fibers having 4 deniers and a melting point of 110 DEG C and 6 to 15 deniers and a high melting point PE fibers having a melting point of 264 DEG C on the front and rear surfaces of the 2.5 mm thick ethylene-vinylacetate copolymer (EVA) rubber sheet, respectively. A fiber aggregate in a web state having a thickness of 5 cm in which 70 wt% was randomly mixed was disposed. At this time, the low-melting-point aliphatic PE pellets having a melting point of about 110 ° C., purchased from Huvis, were uniformly disposed between the rubber sheet and the fiber assembly at a ratio of about 20 g per 1 m ² of the rubber sheet. Subsequently, the fibrous assembly / rubber sheet / fiber assembly three-layer laminate was heated on the conveyor belt 10 having an air suction function using a hot air of 150 to 200 ° C. from the first hot air supplier 21, It supplied to the 1st cooling compression roller 31 of -10 degreeC, and primary compression was carried out. Here, the first cold-compressed resultant is heated by hot air at 150 to 200 ° C. from the second hot air supplier 22 while guided by the guide roller 40, and then the second cold compression roller 32 at 5 to 10 ° C. ) Was supplied again to secondary compression. Subsequently, the second compressed product is passed through the third hot air supplier 23 at 150 to 200 ° C. and the third cold compression roller 33 at 5 to 10 ° C. in the same manner, and then the conveyor-type cooler 50. Molding) cooled to obtain a PE nonwoven composite sheet having a thickness of 20mm.

Example 2

The PE nonwoven composite plate was manufactured by the following process in the hot plate type hot press apparatus for wood processing shown in FIG. 5. The hot plate type hot press device 58 is provided with several heating plates 62 and pressurizing means 60. This type of hot plate type hot press device is widely used for the production of rock wool or compressed wood board material. First, in the same manner as in Example 1, 30% by weight of low-density PE fiber having a melting point of 110 ° C and 6 to 15 deniers, respectively, on the front and rear surfaces of the 2.5 mm thick ethylene-vinylacetate copolymer (EVA) rubber sheet, A fiber aggregate in a web state having a thickness of 5 cm in which 70 wt% of the high melting point PE fibers at a melting point of 264 ° C. was randomly mixed was disposed. At this time, a low melting point aliphatic PE pellet having a melting point of about 110 ° C. purchased from Huvis was uniformly disposed between the rubber sheet and the fiber assembly at a ratio of about 20 g per 1 m ² of the rubber sheet, and the fiber assembly was heated and compressed. In order to prevent welding to the heating plate of the press, a PET woven fabric having a thickness of 1 mm having the same area was attached to the front and back surfaces of the three-layer laminate.

Subsequently, the three-layer laminate covered with this PET woven fabric was sandwiched between the heating plates 62 and pressurized by the pressing means 60, and then cooled at 0 to 5 ° C. to a thickness of 20 mm equal to that of the composite sheet prepared in Example 1. PE nonwoven composite sheet material was obtained.

Comparative Example 1

Except that the rubber sheet layer was not used, only the same 20 mm thick PE nonwoven layer as the composite sheet of Example 1 was used, using the same web as in Example 1 and the fiber aggregate in the same web state used in Example 1. A PE nonwoven composite plate was produced.

Comparative Example 2

Except that the rubber sheet layer was not used, only the same 20 mm thick PE nonwoven layer as the composite sheet of Example 1 was used, using the same web as in Example 2 and the fiber aggregate in the same web state used in Example 1. A PE nonwoven composite plate was produced.

Comparative Example 3

Composite plate of Example 1 using the same web as in Example 1 and the same web fiber assembly used in Example 1, except that a polymethyl methacrylate plate of the same thickness was used instead of the rubber plate. A PE nonwoven composite sheet having the same 20mm thickness was obtained.

As a result of observing the PE nonwoven fabric layer of the fibrous sheet obtained in Examples 1 to 2 and Comparative Examples 1 to 3, in all cases of Examples 1 to 2 and Comparative Examples 1 to 3, the high melting point PE fibers were kept intact and low It was confirmed that the melting point PE fibers were melted.

The sound insulation test results of the fiber board materials obtained in Examples 1 to 2 and Comparative Examples 1 to 3 are summarized in Table 1 below. In the soundproof test, when the partition is installed in the center of the room of 3m × 5m × 2.3m standard and the cassette tape player is operated at the maximum volume in one space, the noise level is felt inside the other space. Was evaluated for 10 observers.

Noise level Number of people who answered quietly The number of people who answered that it was normal Number of people who answered loud Example 1 7 3 0 Example 2 7 3 0 Comparative Example 1 0 4 6 Comparative Example 2 0 4 6 Comparative Example 3 0 8 2

Referring to Table 1, the PE nonwoven composite plate obtained in Examples 1 to 2 according to the present invention can be seen that the soundproofing effect is superior to the fiber plate obtained in Comparative Examples 1 to 3, which is the fiber of Comparative Examples 1 to 3 The plate material exhibits a sound absorption function, but the sound insulation function is insignificant, whereas the composite plate materials of Examples 1 and 2 contribute to the soundproofing effect as well as the sound absorption function.

On the other hand, the thermal conductivity of the fiber board member of Examples 1 to 2 and Comparative Examples 1 to 3 was measured at a temperature of 20 ± 2 ° C. by the plate heat mooring method specified in KS L 9016-95, and was about 0.031 to 0.040 W /. It was found that both mK had excellent thermal insulation effect.

As described above, the PE nonwoven composite plate material according to the manufacturing method of the present invention can be effectively used as a building interior and exterior materials, partition boards, etc., because the sound absorbing and insulating properties, heat insulating properties, shock absorption, and vibration absorption are excellent. In particular, when used as a floor finishing material, an interlayer sound insulation material, a wall finishing material, such as a conference room, a movie theater, an opera house, a performance hall, and the like, have the following advantages.

(1) In the room, the PE nonwoven composite plate of the present invention has excellent function of absorbing sound waves, which can greatly reduce the problem of noise caused by interference and incident waves on the wall and floor.

(2) In the outdoor, the PE nonwoven composite plate of the present invention is also excellent in blocking the sound wave, so it is excellent in soundproofing effect by preventing the sound wave propagating to the outdoor.

(3) The PE nonwoven fabric layer of the PE nonwoven composite plate of the present invention is compressed to a high density, and is excellent in impact resistance and vibration absorption.

(4) PE non-woven fabric layer of the present invention PE non-woven composite plate has excellent thermal insulation, the indoor heating cost is reduced in winter, the cooling efficiency is increased in summer.

Claims (5)

Rubber sheet layer for increasing the effect for absorbing and blocking sound waves; And PE non-woven composite plate material that is bonded to one or both sides of the rubber sheet material layer and comprises a PE non-woven fabric layer to absorb and block sound waves. The nonwoven fabric of claim 1, wherein the PE nonwoven layer is a PE nonwoven fabric in which randomly mixed 30 to 90 wt% of the high melting point PE fiber and 10 to 70 wt% of the low melting point PE fiber having a melting point of 20 ° C. or more lower than the high melting point PE fiber. PE non-woven composite sheet, characterized in that the layer. The PE sheet according to claim 1, wherein the rubber sheet layer is made of styrene-butadiene rubber, acrylonitrile-butadiene rubber, natural rubber, synthetic isoprene rubber, neoprene rubber, ethylene-vinylacetate copolymer rubber, or a mixture thereof. Nonwoven Composite Plates. The method of claim 1, wherein the high melting point PE fiber is ethylene glycol, 1,3-propanediol or 1,4-butanediol and dimethyl terephthalate (DMT), terephthalic acid (TPA), dimethyl-2,6-naphthalenedicarboxyl PE non-woven composite sheet, characterized in that the polymerization product of the rate (NDC) or 2,6-naphthalenedicarboxylic acid (NDA). The non-woven PE composite of claim 1, wherein the low-melting PE fiber is a polymerization product of ethylene glycol, 1,3-propanediol, or 1,4-butanediol and aliphatic dicarboxylic acid having 4 to 10 carbon atoms. Plate.