Sound absorbing finishing material
Special specifications, technical specifications
▒ Melcotton, sound absorbing finishing materialMC 012~120 TYPE ▒
Dual broadband sound-absorbing material; melamine absorption board 9T~117T & sound control finish (acoustic plaster) 3T dual complex sound-absorbing material (acoustic Laminate), Dual insulation structure (good thermal insulation)
1. General information
1.1 Scope of application
1.1.1 This section concerns the sound absorption of interior architecture, architectural acoustical space, and to the interior space of buildings with the purpose of creating a desirable acousticalfacility. This section specifies the standard physical properties and special specifications of the Melcotton acoustic plaster finish products, i.e. MC 012~120- Wave typeand Board type in compliance with the design drawings and agreements as overseen by supervisors and inspectors.
1.1.2 Installed inside the building or architectural acoustic facility, this section is used for the sound-absorbing properties of the insulating and functional interior finished material.
A separate design can be formed on the surface finish layer and consists of dual complex sound-absorbing materials that offer broadband sound-absorbing performance. It is composed of sound absorbing base layer and sound absorbing enhancement layer. The glass fiber reinforced mesh is laminated inside the surface layer.
* The sound absorbing base layer is made of the melamine form board, i.e. BASF’s Basotect G.
* The sound absorbing enhancement layer is made of the acoustic plaster exclusive toMelcotton, i.e. Mel-coat.
Mel-coat is a plaster used for sound control and sound absorption. It consists of primer, finish coat, and exclusive thinner. Of these, it is the exclusive thinner which is the functional thinner used to activate or control the sound-absorbing performance in line with frequency.
* It is a functional acoustic plaster finishing material consisting of broadband sound-absorbing structure, dual sound-insulating structure, dual insulation structure, and dual complex sound-absorbing structure with isolated independence space.
* Surface finish designs; horizontal sanding finish, horizontal putty finish, spray finish, and special design finish.
* Surface finish colors; the colors are supplied according to the standard design color chip.
1.1.3 As for the layered section and thickness of the Melcotton T. 012~120㎜ acoustic plaster finish, the thickness of the base sound-absorbing material is selected according to the sound-absorbing plan and insulation purpose in line with frequency.
* The thickness of the base layer (Basotect_G) is 9~117㎜. It can be supplied according to the material segregation boundary and the thickness of molding.
* The thickness of the sound absorbing enhancement layer is 3㎜, and one reinforced mesh is laminated inside. To increase the compressive strength and durability of a certain part, reinforced mesh lamination can be added (areas where reinforced mesh lamination is added: near the punching area like the lighting/diffuser and at the bottom of the wall).
The enhancement layer provides dual broadband complex sound-absorbing performance. It delivers the sound-absorbing performance of the surface layer and the sound-absorbing adjustment function in line with frequency.
The configuration of the sound absorbing enhancement layer is as follows:
* The thickness of under coating absorption putty (Mel-coat) is 2㎜. The Glass fiber reinforced mesh is laminated inside.
* The thickness of top absorption paint (Mel-coat) is 1㎜, and comprises horizontal sanding finish, horizontal putty finish, spray finish, and specific design finish.
The Mel-coat top finish material comprises the soft type finishing material for the top part of the wall and ceiling, and the solid type finish used for the bottom of the wall or certain reinforced surfaces. Both the soft and solid types may have the same colors and textures.
* The surface layer provides sound-absorbing performance and sound-absorbing control function in line with frequency.
* The sound-absorbing and acoustic control characteristics of the dual complex sound-absorbing material are as follows: It delivers the sound-absorbing performance of the melamine sound-absorbing T. 9~117㎜ porous sound-absorbing material, i.e. the base layer. It also provides a noise reduction coefficient that is suitable for the broadband frequency range with the T. 3mm enhancement layer.
Expression of the functional design of the surface finish of the sound absorbing enhancement layer:
* Providesacoustic wave design applied to the curved structure
* Providesa plane that is extended seamlessly
* Providesa sound control design to control the noise reduction coefficient, sound pressure and reverberation for acoustic facility
1.1.4 The design and application thickness of the base layer (melamine sound-absorbing board; BASF’s Basotect G) must be applied to the sound-absorbing range required for the acoustical space, and the thickness of the sound-absorbing layer can be stipulated for multiple purposes.
1.2 Related drawings
Related drawings include all drawings and other contract documents. The construction work standard specifications “general provisions” (drawings, construction specifications, field guide, the Building Act, the Construction Technology Management Act, the Framework Act on the Construction Industry, the Industrial Standardization Act, the Labor Standards Act, the Occupational Safety and Health Act, laws related to environmental conservation, and other laws related to construction works) are applicable to this section.
1.3 Applicable standards (reference standards)
1.3.1 The following standards form part of this section within the scope specified in this section.
KS F 2805 Method for measurement of sound absorption coefficients in a reverberation room
KS F 2271 Testing method for the incombustibility of internal finish material and building elements (flame-retardant class 2 quasi-noncombustible material test)
KS M 5000-2009 Heat resistance test
KS M ISO 2812-1 Water absorption tests
KS L 9016 Test methods for thermal transmission properties of thermal insulations, KS K2901 Density tests
KS F 2902 Test methods for the bond strength of sprayed fire resistive material applied to structural members
KICM-FIR-1085 Indoor environment improvement functionality tests (VOC, HCHO and NH3 deodorization performance tests)
1.4 Deliverables
1.4.1 Construction plan
1) Detailed process plan (equipment and manpower mobilization plan)
2) Construction status measurement plan
3) Quality control plan (construction sequence and method, materials management, special mentions about the working environment, quality warranty period, management test plans)
1.4.2 Build drawings
1) Floor plan for each floor and set of specifications
2) Sound-absorption drawing as specified in the wall drawing
3) Sound-absorption drawing as specified in the ceiling drawing
4) Detailed drawing of the part deemed to be necessary by the supervisor
1.4.3 Sample: The material, specifications, shape and colors must be approved by the supervisor.
1) For each material and set of specifications
2) Materials and subsidiary materials provided by the materials company
1.4.4 Construction confirmation form (delivery confirmation)
1) Pre-construction (pre-delivery) confirmation form
The contract drawings must be appropriate and the confirmation of the construction conditions must be submitted to, and approved by, the supervisor.
2) Construction (material) test
The construction test confirmation form must be submitted to, and approved by, the supervisor according to “2.3.2 Materials inspection and construction status inspection” in this section.
1.4.5 Product data
1) Sound absorbing base layer (melamine Resin Foam / Basotect Ⓡ G. BASF The Chemical Company) 9T~117T,
2) Surfaceof enhancement layer (Acoustic plasterMel-coat; Acoustic paint for top coating & Acoustical putty for under coating) 3T finish
3) Special specifications of the materials supplier catalog technical data (special mention regarding the construction method and sequence)
1.4.6 Quality certification documents
1) KS Mark Approval Certificate
2) Test report (signed by the quality test agency)
1.4.7 Deliverables at completion of construction (delivery)
1) Submit the work record documents after the work is completed.
2) Submit test reports based on the design drawing and specifications after delivery.
1.5 Quality assurance
1.5.1 Requisite qualifications of the construction company;
The construction company must have a license, a copy of which it must have submitted along with the certificate of construction results. The documents, once submitted, must be approved by the construction supervisor before construction work can be commenced.
1.5.2 Sample work
1) Do the construction work where the supervisor instructs and use the materials and subsidiary materials that are actually used for construction.
2) If the approval of the supervisor is obtained, the sample construction part will become part of the construction work.
1.5.3 Consultation before construction
The various requirements for the planned construction will be reviewed. (Preparatory work related to the construction, period adjustment, and protection and repair of the construction work.)
1.6 Transportation, storage and handling
1.6.1 Transportation and storage
1) Materials must be stored where they are not exposed to snow, rain or direct sunlight, and in a well-ventilated indoor space. All materials must be stored horizontally.
2) The temperature for transportation and storage must be at least 5℃.
1.6.2 Transport of the materials to the site
1) Materials must be transported to the site in such a way that they are not destroyed. In transport, materials must be kept away from water pools or dirt, and kept in a place where contamination can be minimized. Make sure that no defectives are mixed, and that materials are sorted by type. Materials should be delivered and placed at the same time.
1.7 Working conditions at the site
1.7.1 Any construction work currently in progress or completed should not be damaged.
1.7.2 The temperature during the work must be at least 5℃, and the humidity of the finish material must be no greater than 85%.
1.7.3 Take appropriate measures to maintain a suitable environment free from interference from foreign objects or facilities.
1.8 Continuity of work
1.8.1 The relevant construction work will be done on an ongoing basis following consultation with the construction company.
1.8.2 Relevant construction work is as follows:
1) Reinforcement work for the windows and doors
2) Firefighting and facility work, and painting work
3) Lighting and air-conditioning diffuser work
4) Safety and reinforcement work around the sleeves and openings
1.9 Warranty against defects
1.9.1 Contract terms and other warranty and guarantee will be applied to this construction.
1.9.2 Materials suppliers and construction companies will consult with each other. If there is substandard performance within the construction warranty period, or in the event that the results of the construction work differ than the requirements detailed in the specifications and drawings, then the confirmation document,in which the construction is pledged to be redone or repaired under the responsibility of the supervisor, will be attached and submitted to the supervisor.
1.9.3 The warranty period will be three years after the completion of the construction work.
2. Materials
2.1 Materials used
All requirements of“2. Materials” in this section must be satisfied.
2.2 Materials
2.2.1 Specifications
The specifications of the main materials and sub-materials will conform to design drawings, architectural acoustics plan, sound-absorbing material technical data, and special specifications for sound-absorbing materials.
1) The main materials have continuous open pores and multiple pores. The base sound-absorbing material was melamine sound-absorbing Basotect Ⓡ G. THK 9T~117T with nonflammable network structure (Flexible Open-cell Foam). The THK 3T Mel-coat sound absorbing enhancement layer consists of natural cotton pulp, wood pulp, functional active material of acoustic absorption, and bio materials.
2) The sound-absorbing specifications and subsidiary materials of the melamine foam which comprise the base layer:
①Melamine foam sound-absorbing; nonflammable Basotect G. melamine resin foam.
②Sound-absorbing structure of the melamine foam; the cross section of the melamine foam has continuous open pores, multiple pores and the network structure suitable for sound absorption.
③ The surface and corners of the melamine foam board must be protected so that the shape is not damaged when delivering, placing, piling.
④An adhesive binder used for affixing the melamine foam board.
* It must be appropriately selected according to the physical properties specified below. Environment-friendly adhesives for woodworking, sound-absorbing putty, anti-rust primers can be used for plaster boards, MDF and plywood. An adhesive binder that offers resistance against building vibrations and provides durability, such as the rubber elastic adhesive, can be used for galvanized steel plate sandwich panels. Adhesives with bonding durability can be applied on the rear side of the Basotect Ⓡ G., and use the adhesive Basotect Ⓡ G. made with the silicon release paper attached.
* If it is installed on the plastering concrete surface, a horizontal surface must be created on the bottom, and the tile adhesive can be used as the adhesive binder for the plastered surface, concrete surface, and water-proof plaster board surface.
⑤ The melamine foam boards by thickness (base layer) may be cut and supplied according to 1250×2500㎜ / T9, T12, T17, T22, T27, T32, T42, T47㎜~T117㎜, or the thickness of the material separator, molding and design dimensions after mutual consultation.
* Customized design and fabrication is possible. Flat boards, wave boards, edge boards, concave-convex boards, and 3 division melamine foam sound-absorbing boards can be supplied.
3) The specifications and subsidiary materials of Mel-coat comprising the sound absorbing enhancement layer
①This is the Mel-coat finished product for dual sound-absorbing materials. It forms the sound-absorption layer of the surface finish on the base layer (melamine board), and this acoustic plasteris composed of the following:
* Mel-coat for under coating (Mel-coat Putty; Absorption Putty) - 18L packaged product
* Coat for top coating (Mel-coat Paint; Absorption Paint) - 18L packaged product
* 18L packaged product of mixture for adjusting the acoustic absorbing effectiveness and viscosity, using forundercoat Mel-coat putty and top-coat Mel-coat paint
* Mel-coat (Soft Type): ceiling and upper part of the wall
* Mel-coat (Solid Type): bottom of the wall and surface-reinforcement
* Required amount of Mel-coat (18L/canned basic requirement); 4~4.5㎡ construction ofT.3mm/㎡ enhancement layer
② Mel-coat consists of natural cotton pulp, wood pulp, mixture for acoustic absorption, bio materials that improve indoor environments, dust suppressants, humidity controllers, environment-friendly binders, deodorant and functional inorganic materials. It is a dedicated acoustic plaster with a sound-absorbing and sound controlling structure.
③ The Cotton Pulp and the Wood Pulp are natural materials that must maintain consistent colors.
④ The functional bio materials must be natural materialsand they must have consistent colors, durability and environment-friendly functionality.
⑤ The pigment is natural and inorganic. Its chromaticity must be durable and stable.
⑥ The Mel-coat Putty and Mel-coat Paint must be able to control the workability and surface texture by controlling the viscosity of the spray or putty horizontal process. Exclusive thinner must be used to dilute it within 5%.
⑦Color may be specified or it may be in accordance with the standard color samples for design (Pantone Color Chip, DIC Chip, Benjamin Moore Color Chip). (As the main material is natural, it may differ slightly from the color of ordinary paint. It must have the quenching effect of natural fiber and bio materials, and show stable colors in terms of the diffused reflection and absorption of light.)
* The color product must be a finished product manufactured in a factory. If the color is changed arbitrarily, the proper color must be determined after consultation with the manufacturer.
⑧ In finishing the joints using the enhancement layer without the base layer in a same set of construction, exclusive primers fit for the characteristics of the materials, anti-rust primers, and oil-based paints will be used for other under coating materials (plywood, MDF, steel plates, galvanized sheet iron).
⑨ The thickness of the enhancement layer, which is the surface finish laminate, is T. 3㎜. The sound absorption specification by thickness must be an officially tested product according to the KS F 2805 Method for the measurement of sound absorption coefficients in a reverberation room.
2.2.2 Types of subsidiary materials and supply specifications
1) Fiber mesh: the glass fiber mesh for reinforcement. The interval of mesh weaving must be within 5㎜, and the supply specification is high-strength glass fiber mesh measuring 1000㎜wide×50~100m long.
2) Hemp tape, mesh tape: used for preventing joint cracks,reinforcing bottom and corners, and the creation of horizontal surfaces
3) Adhesive binder; adhesive for bottom of plaster board (environment-friendly adhesive for woodworking, sound-absorbing putty and adhesive for tiles)
Adhesive for galvanized steel plates (after treatment with primers for metals or anti-rust treatment; natural rubber adhesive, urethane adhesive, elastic adhesive, rubber putty and sound-absorbing putty) adhesive for plastering surfaces and concrete bottom surfaces (adhesive for tiles and adhesive for stones)
4) Protection materials and miscellaneous materials for painting
2.3 Managing the quality of materials
2.3.1 Tests (test standards according to each use)
1) Method for measurement of sound absorption coefficients in a reverberation room: according to KS F 2805
2) Testing method for incombustibility of internal finish material and element of buildings (flame-retardant class 2 quasi-noncombustible material test): according to KS F 2271.
3) Test methods for bond strength: according to ASTM E 736 and KS F 2902.
4) KS M 5000-2009 Testing method for heat resistance
5) KS M ISO 2812-1 Testing method for water resistance
6) KICM-FIR-1085 Functionality of indoor environment
2.3.2 Inspection of construction materials
1) Submission of samples: Submission of samples according to thickness and finish design.