SINOYQX, Melamine Foam Manufacturer & Provider

Using Melamine Foam to Stop Fire Tragedy like Brazil Night Club fire

admin — Tue, 23 Apr 2013 03:18:40 +0000

It was so regretful to hear Brazil Night Club fire tragedy. According to economist that the death toll from a fire that broke out in the early hours of January 27th in a Brazilian nightclub has already reached 232, with more than 100 injured, many severely. Almost all the victims were young; the nightclub, Kiss, in the university town of Santa Maria in the far southern Brazilian state of Rio Grande do Sul, was popular with students. Most of the deaths were from smoke inhalation and asphyxiation.

Questions are being asked about the quality of the nightclub building and whether emergency procedures were followed. The blaze appears to have been started by a pyrotechnic flare lit on stage by a member of the band; sound-proofing material caught fire, producing toxic gases which quickly overpowered many in the crowd. Police said that at least one exit was blocked. Television stations broadcast images of firefighters, helped by bystanders, breaking through a wall to get in. Some of the victims were found in the bathrooms, possibly because they mistook them for emergency exits, and were then unable to come back out through the panicked crowds.

The real murderer, however, I think it was the sound-proofing material, PU FOAM, (polyurethane foam). Even some PU foam, which adds fire-proofing agent when producing, they were easily lit and then released toxic gases when they exposed to any outside flame.

It is the real murderer of this tragedy, if we want to stop such fire tragedy, we should stop using fire-spreading materials PU-FOAM as construction materials.

Why not try melamine foam, now, through it will cost higher, comparing with PU foam, but which is more important for you, living or money?

But why does melamine foam win other sound-proofing and fire-retardancy materials?

The reason is simple, for melamine foam is able to provide lightweight, sound-proofing and fire-retardancy properties, especially the flame-retardancy performance.

Melamine foam is a kind of soft, thermosetting and environmental protection material made from melamine resin by foaming. It has three-dimensional grid structure and 99% opening rate.

Melamine foam fire-retardancy demonstration, from SINOYQX YarQuenXer acoustical melamine foam.

It is time to purchase YarQuenXer melamine foam to stop fire tragedy via sales@sinoyqx.com.

SINOYQX Melamine Foam Sound Containment System for Anechoic Chambers Application

admin — Sat, 23 Mar 2013 01:59:39 +0000

Featured properties

 Class A Fire Retardant
 High Performance Absorption
 Fiber Free
 Anechoic Wedge Design
 Low-density, 4-12KG/M3

Material:
SINOYQX 99% Open cell MELAMINE FOAM
Pattern:
The linear wedge pattern offers excellent absorption and allows you to create many different designs. Install vertically, horizontally, diagonally, checkerboard as well as create your own design.
Application:
For use in all industrial, commercial, audio, OEM and residential markets; Ceilings, wall partitions, sound studios, radio stations, band rooms, gymnasiums, swimming pools, gun ranges, mechanical rooms and enclosures. Thicker wedges are designed for use in anechoic chambers and test cells.
Thickness:
5”, 10”, 15”, 20” and custom (Standard Panel)
Sizes:
197″ x 79″ (diagrams) and custom sizes
Colors:
 Natural White or Light Grey
 Custom colors available upon request

If you are interested in SINOYQX melamine foam for anechoic chambers, please feel free to contact us via sales@sinoyqx.com or phone 0086-28-6792-0663.

Melamine Foam Lotus Drawing

admin — Mon, 21 Jan 2013 03:25:33 +0000

Thanks to melamine foam plastic exceptional sound proofing performance and easily-processed property, melamine foam plastic, manufactured and provided by SINOYQX, is processed to a lotus drawing for a perfect decoration.

For more information about melamine foam and its sound proofing performance, please visit www.sinoyqx.com or email SINOYQX via, info@sinoyqx.com or voice at 0086-28-6792-0663.

SINOYQX Colorful Melamine Foams for diversified Client Needs

admin — Tue, 11 Dec 2012 02:11:57 +0000

SINOYQX( SCC Group), one of the world largest melamine foam plastic manufacturers and providers, provides worldwide clients exceptional acoustic and fire retardancy melamine foams plastic with common white, gray and black color, but also foams with different colors solutions, such as blue melamine foams, orange melamine foams, and red foams, etc, to meet clients’ special requirements.

If you need SINOYQX melamine foams for you acoustic, fire insulation, and clearing solutions, please contact us via sales@sinoyqx.com.

SINOYQX Melamine Foam Fire Retardancy/Insulation Demonstration

admin — Wed, 07 Nov 2012 01:47:17 +0000

SINOYQX melamine foam water resistance demonstration

admin — Wed, 10 Oct 2012 03:52:01 +0000

ACOUSTICAL WALL PANELS

admin — Tue, 25 Sep 2012 02:55:10 +0000

When fiberglass acoustical panels were first introduced into the market several years ago, the fiberglass acoustical core was produced principally by Fiberglass of Canada who had an in-line sanding capability to produce a smooth face surface to which decorative fabrics could easily be bonded to. Unfortunately the fiberglass board produced in Canada was a very short fibered board, which was subject to edge damage during the fabrication process. To solve this problem, the edges were impregnated with a polyester resin which when cured produced a hardened edge to prevent crushing of the edge. New technology used by fiberglass manufacturers in the US is now able to provide a flat smooth face surface suitable for lamination of fabric finishes to the panel surface. When fabric lamination is not desirable and when more custom sizes or longer lengths are required, a track system can be used which allows any size or length of fabric to be stretched over a framework. This also allows for the use of more desirable and environmentally friendly sound absorption material made from recycled, “Green” or “LEED” credit contributing products such as Echo Eliminator™ recycled cotton or Sound Silencer™ PEPP rather than fiberglass. Echo Eliminator, Sound Silencer and the track system are available from Acoustical Surfaces Inc.

The fiberglass cores used in the US today are long fibered resilient fiberglass mats that are sufficiently resilient to withstand abuse and crushing while still being able to be machined to produce a variety of edge profiles.

The soft panel edges also have the ability to improve the acoustical performance due to what is termed the “edge effect”; that is to say the soft edges will also allow acoustical absorption where the panels are separated with a space between the panels. A 1″×24″×48″ panel in effect measures 26″×50″ of absorptive surface but the cost is still only for a 24″×48″ panel, thus for the same amount of cost the client is getting 11% more absorption.

Architectural specifications frequently specify that the panels need to be mounted with male/female zee clips so that the panels can be relocated. Except in very rare cases, if ever, the fact of the matter is, acoustical wall panels are not generally relocated. The primary-reason for acoustical panel use is to reduce the reverberation time and noise build up in a room. Thus acoustical wall panels are a part of the room’s architectural environment.

The most cost effective way of mounting acoustical wall panels is through the use of impaling clips that are permanently mounted to the wall and then impales into the back of the panel where they are locked into place with adhesive that wicks into and binds the glass fibers together. If by chance the panels for any reason do have to be removed, careful removal will pull some of the fiberglass from the panel back. When relocating the panel, simply locate the impaling clips in a different location. Impaling clips provide a more cost-effective approach in both materials and labor to install the panels.

If acoustical panels are being used to reduce reverberation and noise buildup that can interfere with speech intelligibility, the most cost-effective thickness is one inch. At 500 Hertz the absorption value of a 1″ thick panel is in the order of 90 to 95%, which is right in the voice frequency range. Since the absorption values are primarily based on thickness a 2″ thick panel should not necessarily be viewed as a better panel since the additional thickness only provides an additional 5-10% absorption in the voice frequency range. At an additional cost of 30-40% a 10% increase in performance does not make economic sense. On the other hand if the noise problem lies in the low frequency range, then a 2″ thick panel makes more sense since the thicker panels do provide better absorption at the low frequencies. Band rooms are a good example of the need to use thicker panels.

Acoustical Panel performance is based on it’s average absorptive values in the 4 center frequencies to the nearest 0.5 number. This is called the NRC (Noise Reduction Coefficient) The absorptive values indicate the percentage of sound that will be absorbed at the various frequencies. An acoustical panel with a 84.5 NRC will be classified as having an NRC of 85 and a panel with an NRC of 82.4 will be classified as having an NRC of 80. The 5 point difference in published NRC is meaningless since in reality the point spread could be no more than 2.1 actual, which is too close to detect.

Source from www.acousticalsurfaces.com

Or for sound and heat insulation materials, melamine foam solution, please visit www.sinoyqx.com.

Sound Pressure Level & Perceived Volume Reduction

admin — Fri, 17 Aug 2012 07:26:56 +0000

The following table shows various dB levels and the corresponding reduction in actual sound pressure level (SPL) as well as the human perceived volume reduction for reducing noise levels.

dB	Actual SPL Reduction	Perceived Volume Reduction
3 dB	50.00%	18.77%
6 dB	75.00%	34.02%
9 dB	87.50%	46.41%
12 dB	93.75%	56.47%
15 dB	96.88%	64.64%
18 dB	98.44%	71.28%
21 dB	99.22%	76.67%
24 dB	99.61%	81.05%
27 dB	99.80%	84.61%
30 dB	99.90%	87.50%
33 dB	99.95%	89.85%
36 dB	99.98%	91.75%
39 dB	99.99%	93.30%
42 dB	99.99%	94.56%
45 dB	100.00%	95.58%
48 dB	100.00%	96.41%
51 dB	100.00%	97.08%
54 dB	100.00%	97.63%
57 dB	100.00%	98.08%
60 dB	100.00%	98.44%
63 dB	100.00%	98.73%
66 dB	100.00%	98.97%
69 dB	100.00%	99.16%
72 dB	100.00%	99.32%
75 dB	100.00%	99.45%
78 dB	100.00%	99.55%
81 dB	100.00%	99.64%

Signal to Noise ratio (S/N) is expressed as the dB difference between the sound source (such as someone speaking) and the sound at the listeners ear. So if a person were speaking at 65dB, and a car noise was 60dB, the Signal to Noise ratio would be 5dB. In a classroom the recommended background noise level is 35dBA to result in S/N ratio of 20-25 dBA and +15 dBA at the back of the room, with a .6 second reverb time.

A few other important points to note:

A change of 1 dB is generally not perceptible.
A change of 3dB is just perceptible by most humans.
Speech is somewhat understandable at S/N ratios of 0dB (mostly by adults).
Speech is highly understandable at S/N ratios of >15dB by most children.

Source from www.acousticalsurfaces.com, for noise reduction materials, such as, melamine foam, please visit www.sinoyqx.com.

Sound Pressure Level Data (SPL)

admin — Mon, 16 Jul 2012 02:18:00 +0000

Sound pressure level (SPL) or sound level is a logarithmic measure of the effective sound pressure of a sound relative to a reference value. It is measured in decibels (dB) above a standard reference level. The commonly used “zero” reference sound pressure in air is 20 µPa RMS, which is usually considered the threshold of human hearing (at 1 kHz).

The following table presents noise data at octave-band center frequencied for familiar residential, outdoor transportation and building activity noise sources.

Sound Pressure Level
Example Source
Home	63 Hz	125 Hz	250 Hz	500 Hz	1000 Hz	2000 Hz	4000 Hz	8000 Hz	dBA
Alarm Clock at 4-9 ft – Ringing	—	46	48	55	62	62	70	80	80
Electric Shaver at 1.5 ft	59	58	49	62	60	64	60	59	68
Vacuum Cleaner at 3 ft	48	66	69	73	79	73	73	72	81
Garbage Disposal at 2 ft	64	83	69	56	55	50	50	49	69
Clothes Washer at 2-3 ft – Wash Cycle	59	65	59	59	58	54	50	46	62
Toilet – Refilling Tank	50	55	53	54	57	56	57	52	63
Whirlpool, Six Nozzles – Filling Tub	68	65	68	69	71	71	68	65	74
Window Air-Conditioning Unit	64	64	65	56	53	48	44	37	59
Telephone at 4-13 ft – Ringing	—	41	44	56	68	73	69	83	83
TV at 10 ft	49	62	64	67	70	68	63	39	74
Stereo – Teenager Listening Level	60	72	83	82	82	80	75	60	86
Stereo – Adult Listening Level	56	66	75	72	70	66	64	48	75
Violin at 55 ft – Fortissimo	—	—	91	91	87	83	79	66	92
Normal Conversational Speech at 3 ft	—	57	62	63	57	48	40	—	63
Outdoors	63 Hz	125 Hz	250 Hz	500 Hz	1000 Hz	2000 Hz	4000 Hz	8000 Hz	dBA
Birds at 10 ft	—	—	—	—	—	50	52	54	57
Cicadas	—	—	—	—	35	51	54	48	57
Large Dog at 50 ft – Barking	—	50	58	68	70	64	52	48	72
Lawn Mower at 5 ft	85	87	86	84	81	74	70	72	86
Pistol Shot at 250 ft – Peak Impulse Levels	—	—	—	83	91	99	102	106	106
Surf at 10-15 ft – Moderate Seas	71	72	70	71	67	64	58	54	78
Wind in Trees – 10 mph	—	—	—	33	35	37	37	35	43
Transportation	63 Hz	125 Hz	250 Hz	500 Hz	1000 Hz	2000 Hz	4000 Hz	8000 Hz	dBA
Large Trucks at 50 ft – 55 mph	83	85	83	85	81	76	72	65	86
Passenger Cars at 50 ft – 55 mph	72	70	67	66	67	66	59	54	71
Motorcycle at 50 ft – Full Throttle, Without Baffle	95	95	91	91	91	87	87	85	95
Snowmobile at 50 ft	65	82	84	75	78	77	79	69	85
Train at 100 ft – Pulling Hard	95	102	94	90	86	87	83	79	94
Train Siren at 50 ft	88	90	110	110	107	100	91	78	109
Car Horn at 15 ft	—	—	—	92	95	90	80	60	97
Commercial Turbofan Airplane at 1 mile – From Takeoff Flight Path	77	82	82	78	70	56	—	—	79
Military Helicopter at 500 ft – Single Engine, Medium Size	92	89	83	81	76	72	62	51	80
Interiors	63 Hz	125 Hz	250 Hz	500 Hz	1000 Hz	2000 Hz	4000 Hz	8000 Hz	dBA
Amplified Rock Music Performance – Large Arena	116	117	119	116	118	115	109	102	121
Audiovisual Room	85	89	92	90	89	87	85	80	94
Auditorium – Applause	60	68	75	79	85	84	75	65	88
Classroom	60	66	72	77	74	68	60	50	78
Computer Equipment Room	78	75	73	78	80	78	74	70	84
Dog Kennel	—	—	90	104	106	101	89	79	108
Gymnasium	72	78	84	89	86	80	72	64	90
Kitchen	86	85	79	78	77	72	65	57	81
Laboratory	65	70	73	75	72	69	65	61	77
Library	60	63	66	67	64	58	50	40	68
Mechanical Equipment Room	87	86	85	84	83	82	80	78	88
Music Practice Room	90	94	96	96	96	91	91	90	100
Racquetball Court	82	85	80	85	83	75	68	62	86
Reception and Lobby Area	60	66	72	77	74	68	60	50	78
Teleconference	65	74	78	80	79	75	68	60	83

Intermittent or peak noises may exceed the data given in the table by 5 decibels or more, depending on the source or environment. For many practical problems, however, the data can be considered to be typical source levels at the given distance and condition, or average general activity levels for interiors. The data can be used for design purposes if proper consideration is given to especially loud equipment or sources, which may exceed it, unusual site conditions, and any other conditions that deviate from normal. For example, it is prudent to measure transportation noise at proposed building sites near highways, airports, etc., so design data will represent existing noise sources and reflect specific site features. Note also that modern aircraft, trucks and office equipment may not be as loud as the examples in the table.

Note: Sources for noise level data include Journal of the Acoustical Society of America, Sound and Vibration, Noise Control Engineering Journal and technical publications of the U.S. Environmental Protection Agency and the U.S. National Bureau of Standards.

Reprinted from the 1988 edition of Architectural Acoustics with the kind permission of Author, David Egan.

Sourced from acousticalsurfaces, from noise reduction material, melamine foam, please visit SINOYQX official size www.sinoyqx.com.

Sound Absorbing Materials to be affected by Sound Absorption Materials Distribution

admin — Mon, 02 Jul 2012 02:16:22 +0000

The efficiency of a sound-absorbing material can be affected by its distribution and location in a room. 25 panels of sound-absorbing material, for example, each 2′×2′, will absorb more sound energy per panel when spaced in a “checkerboard” pattern on a 200 sq ft plaster ceiling than a uniform coverage of the same material.

This increase in efficiency (called the area effect) is due to the diffraction of sound energy around the perimeters of the spaced sound-absorbing panels and to the additional sound absorption provided by the exposed panels’ edges. The efficiency of sound-absorbing panels increases as the ratio of the perimeter to surface area increases.

The 25 spaced absorbers have a ratio of perimeter to surface area 5 times the ratio for the 25 uniform-coverage absorbers. Sound energy reflected from the hard-surfaced plaster adjacent to the absorbent edges in the checkerboard configuration tends to spill over onto the sound-absorbent panels.

Therefore, the spaced absorbing material absorbs more sound energy than would be accounted for by its area. This kind of surface treatment also can be used to achieve a diffuse sound field, which is desired in music practice rooms. Note that the total absorption contributed by spaced absorbers in this example will be only slightly less than the absorption provided by coverage of the entire 200 sq ft ceiling.

References

T.W. Bartel. “Effect of Absorber Geometry on Apparent Absorption Coefficients as Measured in a Reverberation Chamber”, Journal of the Acoustical Society of America, April 1981.

Reprinted from the 1988 edition of Architectural Acoustics with the kind permission of Author, David Egan.

Note: Assuming a 1″ thickness of the sound-absorbing panels in the foregoing example, the sound absorbing area of the panel edges contribute an additional 23% to the 100 sq ft surface area shown.

Source from www.acousticalsurfaces.com , for more about sound absorber, such as melamine foam, please log into www.sinoyqx.com .