Interior / exterior architectural panel using regenerated fibers and having enhanced flame retardancy

Abstract

The invention discloses a building interior / exterior decoration plate using regenerated fibers and having enhanced flame retardance. The building interior / exterior decoration plate comprises a flame-retardant plate, a regenerated fiber layer and a regenerated fiber layer, wherein the flame-retardant plate is provided with a plurality of sound wave induction holes for inducing sound waves; and a sound-absorbing sheet that absorbs sound waves flowing in through the sound wave inducing holes by being adhered to the other side surface of the flame-retardant plate. The flame-retardant plate is formed by laminating a plurality of layers, the sound wave induction holes of the flame-retardant plate arranged at the lower part are expanded in size compared with the sound wave induction holes arranged at the upper part, and the sound-absorbing sheet is formed by impregnating a non-woven fabric in a melamine-based flame retardant aqueous solution to impart flame retardancy.

Description

Technical Field

[0001] The present invention relates to a building interior / exterior decorative board using recycled fibers and having enhanced flame retardant properties that meet the requirements of waterproofness, quasi-non-combustibility, fire resistance and sound absorption, and in particular to a flame retardant board having a plurality of sound wave induction holes that can perform a primary attenuation of sound waves by diffuse reflection, and a sound absorbing sheet that absorbs sound waves for a secondary time by adhering to the other side of the flame retardant board, wherein the sound absorbing sheet is a building interior / exterior decorative board using recycled fibers and having enhanced flame retardant properties, which is formed by impregnating the sheet with an aqueous solution of a melamine-based flame retardant. Background Art

[0002] Generally, the panels are constructed by filling insulating materials such as polyurethane foam for forming internal supporting stress between surface components such as steel plates for forming supporting stress. This type of building panel has excellent thermal insulation and heat preservation effects, and is therefore highly regarded in terms of energy saving, high strength, reduced construction costs, and maintaining environmental hygiene.

[0003] However, this type of building board is applicable to various boards, especially in places where a lot of noise is generated, such as lecture halls, gymnasiums, various factories and parking lots. The noise is superimposed on the inner surface, causing sound reflection and resonance, which leads to a significant decrease in indoor workability and comfort, and is particularly difficult to resist fire.

[0004] Recently, boards used as building interior materials and furniture boards are made of non-combustible or quasi-non-combustible materials to prevent fire. Non-combustible boards are made of materials such as vermiculite, cement, and loess, but the materials used to improve non-combustibility have problems such as heavy weight, poor construction performance, difficulty in cutting and processing, and detection of harmful components.

[0005] Therefore, in order to ensure the evacuation time in the event of a fire, a board using a semi-non-combustible material has been developed. Such boards use materials containing flame retardants, but often fail to achieve sufficient flame retardant effects due to insufficient flame retardant treatment.

[0006] In Korean Patent Publication No. 10-2018-0107524, a quasi-incombustible fiberboard is manufactured by impregnating paper with an impregnation composition containing a flame retardant. However, since the flame retardant component cannot be sufficiently contained in the impregnation process, it is difficult to ensure optimal flame retardancy.

[0007] In addition, Korean Registered Patent Gazette No. 10-0776377 describes a method for obtaining a fireproofing effect by impregnating and coating a silicone fireproofing composition into fabrics, plates, plates, and non-woven fabrics, etc. However, in the above case, it is still difficult to make the substrate fully contain flame retardant components through the impregnation process, so there are still limitations in improving flame retardancy.

[0008] Prior art literature

[0009] Patent Literature

[0010] (Patent Document 0001) Korean Patent Publication No. 10-2000-0000292

[0011] (Patent Document 0002) Korean Patent Publication No. 10-2018-0107524

[0012] (Patent Document 0003) Korean Registered Patent Gazette No. 10-0776377 Summary of the invention

[0013] The present invention aims to solve the above-mentioned problems. The first purpose of the present invention is to provide a building interior / exterior decoration board material using recycled fibers with enhanced flame retardant properties, including a flame retardant board having a plurality of sound wave inducing holes that can perform a first attenuation of sound waves by diffuse reflection, and a sound-absorbing sheet that absorbs sound waves for a second time by adhering to the other side of the flame retardant board, thereby improving its sound absorption performance and meeting the requirements of quasi-non-combustibility, fire resistance and sound absorption.

[0014] The second object of the present invention is to provide a building interior / exterior decorative board using recycled fibers with enhanced flame retardant properties, comprising an impregnation composition improved to ensure high dispersibility of flame retardant components, thereby improving its flame retardancy and durability, and satisfying quasi-non-combustibility, fire resistance and sound absorption.

[0015] In order to achieve the above-mentioned purpose, in a first aspect, the present invention relates to a building interior / exterior panel material using recycled fibers, which satisfies quasi-non-combustibility, fire resistance and sound absorption, and has enhanced flame retardant properties, comprising: a flame retardant board, which is formed with a plurality of sound wave inducing holes for inducing sound waves; and a sound absorbing sheet, which absorbs the sound waves flowing in through the sound wave inducing holes by adhering to the other side of the flame retardant board; the flame retardant board is composed of a plurality of layers stacked together, and the sound wave inducing holes of the flame retardant board arranged at the lower part are expanded in size compared with the sound wave inducing holes arranged at the upper part, and the sound absorbing sheet is constructed in a manner that a non-woven fabric is impregnated with an aqueous solution of a melamine flame retardant to impart flame retardancy.

[0016] In a second aspect, the present invention is characterized in that, based on the first aspect, the shape of the acoustic wave induction hole is one of a quadrilateral, a triangle, a pentagon, a hexagon, a heptagon, an octagon and a circle.

[0017] In a third aspect, the present invention is characterized in that: on the basis of the first aspect, the flame retardant board is composed of papermaking made of fiber material containing waste fibers and an impregnation composition, the impregnation composition comprising: a flame retardant, composed of 20wt.% to 30wt.% of triphenyl phosphate (TPP), 50wt.% to 60wt.% of aluminum hydroxide (Al(OH)3) and 10wt.% to 20wt.% of decabromodiphenyl ethane (DBDPE); and silica, surface-treated by mixing 80mol%-90mol% of a copolymer (poly(n-butyl acrylate)-b-poly(methylmethacryl ate), PBA-PMMA) with 10mol% to 20mol% of silica particles, wherein the PBA-PMMA is composed of 10wt.% to 20wt.% of polybutyl acrylate and 80wt.% to 90wt.% of polymethyl methacrylate.

[0018] In a fourth aspect, the present invention is characterized in that: based on the third aspect, the fiber material is composed of a fiber material ground by a pulping process, and the flame retardant board is manufactured by impregnating the papermaking into the impregnation composition and then hot extruding it.

[0019] The invention provides a building interior / exterior decorative panel using recycled fibers that has enhanced flame retardant properties and satisfies waterproofness, quasi-non-combustibility, fire resistance and sound absorption, including a flame retardant panel having a plurality of sound wave induction holes that can perform a first attenuation of sound waves by diffuse reflection, and a sound-absorbing sheet that absorbs sound waves for a second time by adhering to the other side of the flame retardant panel, thereby achieving the effect of improving its sound absorption performance.

[0020] Furthermore, the flame retardant component contained in the impregnation composition of the flame retardant plate is sufficiently impregnated into the paper, thereby achieving an effect of improving the flame retardancy of the paper panel.

[0021] Furthermore, the sound-absorbing sheet is formed by impregnating a non-woven fabric in an aqueous solution containing tetraorthosilicate (TEOS) and 1N hydrochloric acid as an acid catalyst, and then impregnating the dried non-woven fabric again in an aqueous solution of a melamine flame retardant in order to distribute silica and a flame retardant in the non-woven fabric, thereby achieving the effect of enhancing its flame retardancy. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1is an oblique view of a building interior / exterior decorative board using recycled fibers and having enhanced flame retardancy according to the present invention;

[0023] Figure 2 yes Figure 1 An oblique view of the flame retardant board shown in and an oblique view of its bottom surface;

[0024] Figure 3 is a schematic diagram of the structure of the acoustic wave induction hole according to multiple embodiments of the present invention;

[0025] Figure 4 It is a conceptual diagram of sound wave attenuation based on a cross-section diagram;

[0026] Figure 5 are photographs of direct flame combustion test results of test bodies made using the membrane board (a), the flame retardant board of the present invention (b) and the wood board (c); and

[0027] Figure 6 This is a conceptual diagram of another use example of the building interior / exterior panel using recycled fiber with enhanced flame retardancy according to the present invention.

[0028] Description of reference numerals:

[0029] 10. Flame retardant board; 11. Sound wave induction hole; 12. Internal space; 20. Sound absorbing sheet; 100. Building interior / exterior decorative board using recycled fiber with enhanced flame retardant properties. DETAILED DESCRIPTION

[0030] In order to make the above-mentioned purpose, other purposes, features and advantages of the present invention more clearly understood, the present invention will be further described in detail below in conjunction with the accompanying drawings and preferred embodiments. However, the present invention is not limited to the embodiments described herein, and can also be implemented by other embodiments.

[0031] It should be understood that the embodiments described herein are only intended to make the disclosed content more comprehensive and complete, and to fully convey the concept of the present invention to those skilled in the art.

[0032] The embodiments described and illustrated herein also include embodiments complementary thereto.

[0033] In this specification, unless otherwise specified in the context, singular words also include plural meanings. When the terms "comprise" and / or "include" are used in this specification, they are intended to cover non-exclusive inclusion, that is, in addition to the mentioned constituent elements, one or more other constituent elements may exist or be added.

[0034] The present invention will be described in detail below with reference to the accompanying drawings. In the process of describing specific embodiments below, various specific contents are only used to more specifically describe the present invention and help understand the present invention. However, it should be understood by those of ordinary skill in the art that the present invention can also be implemented without including the above-mentioned various specific contents. It should be noted that in some cases, in order to avoid confusion in the process of describing the present invention, parts that are currently well-known and have no significant relationship with the present invention will be omitted when describing the present invention.

[0035] The building interior / exterior decorative board using recycled fibers and having enhanced flame retardancy according to the present invention will be described in detail with reference to the accompanying drawings.

[0036] Figure 1 is an oblique view of a building interior / exterior decorative board using recycled fibers and having enhanced flame retardancy according to the present invention; Figure 2 yes Figure 1 An oblique view of the flame retardant board shown in and an oblique view of its bottom surface; Figure 3 is a schematic diagram of the structure of the acoustic wave induction hole according to multiple embodiments of the present invention; Figure 4 It is a conceptual diagram of sound wave attenuation based on a cross-section diagram; Figure 5 The photographs are of the results of direct flame combustion tests of test bodies made using a film sheet (a), a flame-retardant sheet of the present invention (b), and a wood board (c).

[0037] like Figures 1 to 5 As shown, the present invention relates to a flame retardant board having a plurality of sound wave induction holes which can attenuate sound waves for the first time by diffuse reflection, and a sound absorbing sheet which absorbs sound waves for the second time by adhering to the other side of the flame retardant board, wherein the sound absorbing sheet is impregnated in a melamine flame retardant aqueous solution and is a building interior / exterior decorative board material using recycled fibers, which satisfies quasi-non-flammability, fire resistance and sound absorption and has enhanced flame retardant properties.

[0038] The building interior / exterior decoration board material 100 using recycled fibers and having enhanced flame retardant properties according to the present invention is generally composed of two parts: a flame retardant board 10 that attenuates sound waves by diffuse reflection after inducing the sound waves, and an absorption sheet 20 that absorbs the sound waves by adhering to the other side of the flame retardant board 10.

[0039] [Flame retardant board]

[0040] like Figure 1 and Figure 2 As shown, the flame retardant plate 10 has a structure in which a plurality of sound wave induction holes 11 for inducing sound waves are formed.

[0041] The flame retardant plate 10 is composed of a plurality of layers stacked together, and the acoustic wave induction holes 11 of the flame retardant plate 10 disposed at the lower portion are structured such that the size thereof is expanded compared to the acoustic wave induction holes 11 disposed at the upper portion.

[0042] As described above, since the flame retardant plates 10 stacked on each other are configured in such a manner that the sizes of the acoustic wave induction holes 11 are different from each other, a concave-convex internal space portion 12 having a convex-shaped step difference is formed.

[0043] Therefore, if Figure 4 As shown, when sound waves flow in through the smaller sound wave induction hole 11, they are irregularly diffusely reflected in the concave-convex internal space portion 12 with step differences and converted into heat energy, thereby attenuating the sound waves.

[0044] Furthermore, if Figure 3 As shown, the shape of the sound wave induction hole 11 formed on the flame retardant plate 10 is a quadrilateral, but in other embodiments, it can also be one of a triangle, a pentagon, a hexagon, a heptagon, an octagon and a circle.

[0045] Furthermore, the flame retardant board may be provided with structural features that enhance its mechanical properties and bending fracture strength and durability through the acoustic wave induced holes 11 .

[0046] Furthermore, the flame retardant board may have an additional function of achieving interior decoration effect through the sound wave induction holes 11 .

[0047] Furthermore, the flame retardant board 10 is composed of paper made from a fiber material including waste fibers and an impregnation composition.

[0048] The impregnation composition comprises a flame retardant and silicon dioxide, wherein the flame retardant is composed of triphenyl phosphate (TPP), aluminum hydroxide (Al(OH)3) and decabromodiphenyl ethane (DBDPE); and the silicon dioxide is surface treated with a copolymer of polybutyl acrylate and polymethyl methacrylate.

[0049] Generally, paper sheets are manufactured by a papermaking process of making paper using a fiber material, and after impregnating the paper obtained by the papermaking process with an impregnation composition, the paper is hot-extruded. In order to impart flame retardancy, a flame retardant may be added to the impregnation composition for processing.

[0050] The technical feature of the flame retardant board 10 according to the present invention is that the components of the conventional impregnation composition for manufacturing paper sheets are optimized to ensure high dispersion of the flame retardant components in the paper sheets and thereby improve the flame retardancy thereof.

[0051] The flame retardant in the impregnation composition may be a flame retardant composed of three components, namely, triphenyl phosphate, aluminum hydroxide, and decabromodiphenylethane. It is known that the flame retardancy of the papermaking sheet can be improved by means of the flame retardant.

[0052] In particular, when the various components of the flame retardant are mixed in appropriate proportions, the compatibility with the components constituting the papermaking composition can be improved. Therefore, even if the content of the flame retardant is increased, the impregnation process can be successfully completed, and a larger amount of flame retardant can be impregnated compared to a general impregnation process.

[0053] Specifically, the flame retardant constituting the impregnation composition is composed of 20wt.% to 30wt.% of triphenyl phosphate, 50wt.% to 60wt.% of aluminum hydroxide and 10wt.% to 20wt.% of decabromodiphenylethane, which can prevent the occurrence of agglomeration caused by phosphorus-based flame retardants such as triphenyl phosphate or bromine-based flame retardants such as decabromodiphenylethane while ensuring good dispersibility during the impregnation process.

[0054] In addition, the aluminum hydroxide constituting the flame retardant can not only achieve a flame retardant effect, but also improve the hydrophilicity of the fiber material constituting the papermaking and thereby improve its bonding strength.

[0055] Taking into account the dispersibility in the fiber material constituting papermaking, it is appropriate to classify the various components constituting the flame retardant into particle sizes of 50 μm to 150 μm. If the particle size is too small, the amount of unreacted powder that cannot be dispersed into the fiber material during the impregnation process will increase, and if the particle size is too large, sufficient impregnation cannot be achieved, so it is appropriate to classify them into the above size range.

[0056] In addition, the impregnation composition contains silica, especially silica surface-treated with a copolymer of polybutyl acrylate and polymethyl methacrylate, which can improve the dispersibility and formability of the flame retardant.

[0057] The polymethyl methacrylate copolymer is grafted with silica particles to form surface-treated silica particles. The surface-treated silica particles can not only act as a dispersant, but also can quickly disperse the flame retardant in the fiber material constituting papermaking and promote its adsorption by virtue of the hydrophilicity of the silica bound to the end of the copolymer.

[0058] It is known that, in the case of a copolymer of polybutyl acrylate and polymethyl methacrylate, when the weight ratio of butyl acrylate to methyl methacrylate in the copolymer is 1:1, it can be used as a coating agent, and when the content of butyl acrylate in the copolymer reaches 90 wt.% or more, it can be used as an adhesive. In other words, the physical properties of the copolymer will change according to the composition ratio of the copolymer.

[0059] In the present invention, the copolymer of polybutyl acrylate and polymethyl methacrylate is composed of 10 wt.% to 20 wt.% of polybutyl acrylate and 80 wt.% to 90 wt.% of polymethyl methacrylate. In addition, in order to form a graft copolymer by adding silica to the copolymer, 80 mol % to 90 mol % of the copolymer of polybutyl acrylate and polymethyl methacrylate and 10 mol % to 20 mol % of 0.1 μm to 0.5 μm silica particles can be mixed and graft copolymerized to produce surface-treated silica.

[0060] In other words, the manufacturing process of the impregnation composition may include the steps of: manufacturing a copolymer of polybutyl acrylate and polymethyl methacrylate; manufacturing surface-treated silica by mixing the copolymer with silica particles; and mixing a flame retardant into the silica.

[0061] In addition, the impregnation composition is composed of 30wt.% to 40wt.% of a copolymer of polybutyl acrylate and polymethyl methacrylate, 10wt.% to 20wt.% of surface-treated silica, and 50wt.% to 60wt.% of a flame retardant, and is used after forming an aqueous solution by adding 50wt.% to 200wt.% of water to ensure smooth impregnation. In addition, in order to give color to the flame retardant board 10, an inorganic pigment may be added during the manufacture of the impregnation composition.

[0062] For the surface-treated silica particles, polybutyl acrylate and silica particles can be reacted in the presence of copper bromide (CuBr2) and ascorbic acid to produce silica particles surface-treated with polybutyl acrylate, and then methyl methacrylate is added to the silica particles and reacted in the presence of copper bromide to obtain silica in the form of silica particles surface-treated with a copolymer of polybutyl acrylate and polymethyl methacrylate. Next, a flame retardant is added to the produced silica and stirred to obtain an impregnation composition.

[0063] The paper is impregnated with the impregnation composition obtained in the above manner, and the paper can be obtained by using a fiber material including waste fibers through a general paper production process.

[0064] In the Korean Patent Publication No. 10-2018-0107524, in order to produce a quasi-non-flammable papermaking fiber board, a papermaking composition containing a flame retardant is mixed with a fiber material in the papermaking process to produce papermaking, and a process of impregnating the produced papermaking with an impregnation composition containing a flame retardant is adopted. By introducing the flame retardant twice as described above, the content of the flame retardant in the papermaking can be increased, but when the flame retardant is included in the papermaking manufacturing process, the durability of the papermaking itself is reduced, resulting in a problem of process defects.

[0065] The present invention is different from the process adopted in the above-mentioned prior art. After the paper is manufactured through the general papermaking process, the flame retardant is introduced into the papermaking fiber only through the impregnation process. In addition, in order to ensure that a sufficient flame retardant effect can be achieved only through the above process, the components and content of the impregnation composition used in the impregnation process are optimized.

[0066] The fiber material uses waste fibers, and the waste fibers can be used alone as natural fibers or synthetic fibers selected from cotton, pulp, polyester and polypropylene, or as mixed fibers. In addition, the waste fibers can also be mixed with general fibers.

[0067] In addition, before the fiber material is used to make paper, the fiber material may be ground in a beating process, wherein the fiber material is first crushed into fine powder and then put into a water tank and ground for 2 to 3 hours.

[0068] The process of making paper using the above-mentioned ground fiber material is a process of dehydrating and drying the fiber material, and a general papermaking process such as forming a paper layer, squeezing and dehydrating, drying, and surface treatment can be adopted. In other words, after the fiber material ejected from the headbox is introduced into the wire section and formed into a web, the squeezing and dehydrating process is performed in the squeezing section, and then the residual water is evaporated in the drying section, and then the thickness of the paper is adjusted in the calender to form paper.

[0069] The manufacturing thickness of the paper can be 1 mm to 5 mm. When the thickness of the paper is too thick, the flame retardant impregnation cannot be successfully completed in the subsequent impregnation process, and when the thickness is too thin, the paper may be damaged in the subsequent process, so it is advisable to manufacture within the above thickness range.

[0070] In the impregnation process, the paper is put into an impregnation tank containing an impregnation composition, and is impregnated while passing through a squeezing guide roller installed in the impregnation tank, and then the water content in the paper is reduced by pressurizing with a steel pressure roller, and the impregnation process is performed in this way. In addition, in order to allow the components of the impregnation composition to penetrate into the fiber constituting the paper, the guide roller can be pressurized and impregnated using rollers supported in an intaglio and relief manner, respectively, and after the impregnation process, a process of drying the obtained flame-retardant flame-retardant board 10 can be performed.

[0071] In addition, the flame retardant plate 10 can be hot extruded using a hot extruder. The hot extrusion molding belongs to a plane hot extrusion molding, which can maintain the smoothness and stability of the fiber constituting the papermaking. When performing the hot extrusion molding process, the sound wave induction hole 11 of the flame retardant plate 10 can be formed by adhering a mold to the upper end of the hot extruder.

[0072] By performing a lamination step of laminating two or more flame-retardant paper sheets that have been heat-pressed or dried, a laminated flame-retardant board 10 can be manufactured.

[0073] In the lamination process, two to six sheets of the flame retardant board 10 can be laminated according to the purpose of the flame retardant board 10. At this time, the laminated board 10 can be laminated after the surface of the flame retardant papermaking sheet to be laminated is coated with an adhesive. By performing the above lamination process, a flame retardant board 10 with a thickness of 2 mm to 30 mm can be finally completed.

[0074] Next, the effects of the flame-retardant panels produced through the examples will be described.

[0075] [Example]

[0076] In order to manufacture the flame retardant board, after the cotton waste fiber with an average length of 40 mm was pulverized, 100 wt.% of the pulverized material was put into a water tank and a beating process was performed for 2 hours.

[0077] The obtained waste fibers were put into a headbox, and the waste fibers ejected from the headbox formed a paper layer in the wire section. Then, they were squeezed and dehydrated in a press section, and then the remaining water was evaporated in a drying section, and then passed through a calender to produce paper with a width of 1000 mm, a length of 2500 mm, and a thickness of 2 mm to 2.5 mm.

[0078] The paper was put into an impregnation tank containing an impregnation composition, and was squeezed by a steel press roller through a guide roller installed inside the impregnation tank to produce a paper sheet, which was then dried for the first time. 2The flame-retardant paper sheet that had been dried for the first time was hot pressed at a pressure of 100° for 3 minutes to obtain a flame-retardant board 10 having a thickness of 2 mm.

[0079] The impregnation liquid is prepared by mixing an impregnation composition composed of 60 wt.% of a flame retardant, 15 wt.% of silicon dioxide, 35 wt.% of a copolymer of polybutyl acrylate and polymethyl methacrylate, and 100 wt.% of water.

[0080] The flame retardant is used after mixing 24 wt.% of triphenyl phosphate, 58 wt.% of aluminum hydroxide and 18 wt.% of decabromodiphenylethane, and the butyl acrylate / methyl methacrylate copolymer is a copolymer composed of 15 wt.% of BA and 85 wt.% of MMA.

[0081] Comparative Example

[0082] For comparison, the same impregnation process as in Example was performed, wherein the impregnation composition used was a composition obtained by mixing 80 wt.% of liquid potassium silicate, 30 wt.% of Ultracarb, and 20 wt.% of diatomaceous earth with 100 wt.% of water.

[0083] A direct fire combustion test was performed on the flame retardant board 10 according to the embodiment and the comparative example and the existing wood board. The results are as follows: Figure 5 As shown in (b), the flame retardant board 10 according to the embodiment does not burn even when directly sprayed with flame, showing excellent flame retardancy. Figure 5 (a) shows flame retardancy, although it is similar to that of the existing wood board ( Figure 5 (c)) The degree of ignition is weaker than that of the example, but significantly more serious than that of the example. It is considered that the above results are due to the fact that the impregnation tool of the present invention can make the flame retardant plate contain a large amount of flame retardant components.

[0084] Through the test of the comparative example, it can be determined that it satisfies the quasi-non-combustibility and fire resistance.

[0085] [Sound-absorbing sheet]

[0086] The sound absorbing sheet 20 may be adhered to the other side of the flame retardant plate 10 by thermal bonding or adhesive.

[0087] In order to enhance its flame retardancy, the sound absorbing sheet 20 is formed by laminating nonwoven fabrics impregnated with an aqueous solution of a melamine-based flame retardant.

[0088] Specifically, the manufacturing process may include the following steps: impregnating a non-woven fabric into an aqueous solution containing tetraorthosilicate (TEOS) and 1N hydrochloric acid as an acid catalyst; drying the impregnated non-woven fabric so that the silica particles are distributed inside the fiber structure; impregnating the dried non-woven fabric again into an aqueous solution of a melamine-based flame retardant, then taking it out and drying it so that the silica and the flame retardant are distributed in the non-woven fabric; and forming the non-woven fabric into a sheet form by stacking three or more dried non-woven fabrics.

[0089] The sound absorbing sheet 20 manufactured in the above manner can absorb and attenuate the sound waves flowing in through the sound wave induction holes 11 by utilizing the pores in the non-woven fabric.

[0090] In addition, if Figure 4 As shown, the sound absorbing sheet 20 can absorb a portion of the sound waves flowing in through the sound wave induction holes 11 and reflect the remaining portion.

[0091] In addition, the sound absorbing sheet 20 also has an additional function of reflecting a part of the sound waves through the silica particles and inducing the reflected sound waves to pass through the inner space portion to undergo irregular diffuse reflection and be converted into heat energy.

[0092] As described above, the building interior / exterior decoration board 100 using recycled fibers with enhanced flame retardant properties according to the present invention can achieve a decoration effect through the sound wave induction holes formed on one side of the flame retardant board, so that it can be used as an exterior decoration material on the ceiling and wall inside the building, and can be installed under the indoor floor of the building as an interior decoration material, so as to be used as a sound-absorbing board for noise reduction in high-rise buildings.

[0093] [Other usage examples]

[0094] Figure 6 This is a conceptual diagram of another use example of the building interior / exterior panel using recycled fiber with enhanced flame retardancy according to the present invention.

[0095] like Figure 6 As shown in (a), the building interior / exterior decoration board 100 using recycled fibers with enhanced flame retardancy according to the present invention can be adhered to the two sides of the honeycomb board made of polyurethane and gypsum, so as to be made into a door panel or wall panel that meets the flame retardancy, quasi-non-combustibility, fire resistance and sound absorption properties.

[0096] In addition, if Figure 6As shown in (b), the building interior / exterior decoration board 100 using recycled fibers with enhanced flame retardancy according to the present invention can be adhered to both sides of a medium density fiberboard (MDF) or a wooden board, and a low-pressure melamine (LPM) or high-pressure melamine (HPM) sheet can be adhered to its surface to use it as a furniture board.

[0097] It should be understood that the embodiments described in the present invention and the structures shown in the accompanying drawings are only preferred embodiments of the present invention and cannot represent all technical ideas of the present invention. Therefore, there may be multiple alternative equivalents and modifications at the time of submitting the present invention.

Claims

1. A building interior / exterior panel using recycled fiber with enhanced flame retardant properties. It is characterized in that include: A flame retardant plate (10), wherein the flame retardant plate is formed with a plurality of sound wave induction holes (11) for inducing sound waves; as well as a sound-absorbing sheet (20) which absorbs the sound waves flowing in through the sound-wave induction holes (11) by adhering to the other side of the flame-retardant plate (10); The flame retardant plate (10) is composed of a plurality of layers stacked together, and the acoustic wave induction hole (11) of the flame retardant plate arranged at the lower portion is a structure in which the size of the acoustic wave induction hole (11) arranged at the upper portion is expanded. The sound absorbing sheet (20) is formed by impregnating a nonwoven fabric with a melamine-based flame retardant aqueous solution to impart flame retardancy.

2. The flame retardant enhanced building interior / exterior panel using recycled fiber as claimed in claim 1, Features: The shape of the acoustic wave induction hole (11) is one of a quadrilateral, a triangle, a pentagon, a hexagon, a heptagon, an octagon and a circle.

3. The building interior / exterior decorative board using recycled fiber with enhanced flame retardancy as claimed in claim 1, Features: The flame retardant board (10) is composed of paper made from a fiber material containing waste fibers and an impregnated composition. The impregnation composition comprises: The flame retardant is composed of 20wt.% to 30wt.% of triphenyl phosphate (TPP), 50wt.% to 60wt.% of aluminum hydroxide (Al(OH) 3 ) and 10wt.% to 20wt.% of decabromodiphenylethane (DBDPE); and silica, the silica being surface-treated by mixing 80mol%-90mol% of a copolymer (poly(n-buthylacrylate)-b-poly(methylmethacrylate), PBA-PMMA) with 10mol% to 20mol% of silica particles, wherein the PBA-PMMA is composed of 10wt.% to 20wt.% of polybutyl acrylate and 80wt.% to 90wt.% of polymethyl methacrylate.

4. The flame retardant enhanced building interior / exterior panel using recycled fiber as claimed in claim 3, Features: The fiber material is composed of fiber material ground by a pulping process, The flame-retardant plate (10) is manufactured by impregnating the papermaking into the impregnation composition and then hot extruding the impregnation composition.

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